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Patent Granted on Mandatory Digital Keys to Prevent Textbook Piracy

First time accepted submitter discussM tipped us to a story about a recently granted patent in which "a system and method preventing unauthorized access to copyrighted academic texts is provided in which trademark licenses, discussion boards, and grade content are integrated into a web-based system that aligns the interests of teaching professionals, students, and publishers while also enhancing the overarching academic mission to create and disseminate knowledge." Quoting Torrent Freak: "As part of a course, students will have to participate in a web-based discussion board, an activity which counts towards their final grade. To gain access to the board students need a special code, which they get by buying the associated textbook." But don't worry too much, from Ars: "Beyond the legal questions, other experts suggested forcing students to buy texts through such a system is unlikely to be implemented. Professors have few incentives to make it more difficult and to compel students even more than they already are to buy textbooks, digital or analog. (A 2011 survey from UC Riverside found that 78 percent of undergraduates 'bought fewer books, bought cheaper books or read books on reserve to help meet expenses.')"

48 of 168 comments (clear)

  1. Profs and books by Anonymous Coward · · Score: 5, Insightful

    They ought to ask how many professors bought all the textbooks they required as students, and never used photocopies.

    1. Re:Profs and books by LSDelirious · · Score: 3, Interesting

      My Organic Chemistry professor "published" his lab manual. For ~$125, you got a shitty spiral type clip bound stack of photocopies. The Lab Manual was not only required for the course, but required to be out at all times during lab procedures, and in several places we were required to write in notes & answers to questions (in addition to our own hand written lab books), then rip out those pages and turn them in... so there was no reselling the book back at the end of the semester. Basically he charged us double the (then) cost of the course tuition to buy his xerox handouts from him. Talk about a fucking ripoff!

      --
      Slavery is the legal fiction that a person is property; A Corporation is the legal fiction that property is a person.
    2. Re:Profs and books by History's+Coming+To · · Score: 2

      I used to work for a bookshop specialising in academic books. We produced specialist textbooks for some courses at the professors request - eg chapters 9-12 from "Fundamentals of Physics", 1-3 of "Div, Grad, Curl" and 4-7 from "Elementary Matrix Algebra" (made up example). It all depended on the various publishers playing ball and allowing us to use their material. We also did textbook rental by the month.

      Personally I don't believe DRM is going to work. The music industry couldn't get it to work and books are easier to copy than music. If I was a publisher I'd simply flood the torrent sites with subtly faulty versions of my books.

      --
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    3. Re:Profs and books by jedidiah · · Score: 2

      I had a class in college where the textbook was written by the professor teaching the course. The textbook was so poorly written that he pretty had to abandon it even for his own class.

      --
      A Pirate and a Puritan look the same on a balance sheet.
  2. Free Curriculum Foundation? by ShanghaiBill · · Score: 2

    How come good free curriculum hasn't emerged? There are a few free curriculum projects out there, but they tend to have low quality, incompatible formats, and make it difficult for people to contribute.

    1. Re:Free Curriculum Foundation? by __aaltlg1547 · · Score: 4, Interesting

      How come good free curriculum hasn't emerged? There are a few free curriculum projects out there, but they tend to have low quality, incompatible formats, and make it difficult for people to contribute.

      Because there's not incentive for professors and other professionals to participate in the development of such. If you wanted it to happen, you'd make the professors' pay or tenure contingent on their contributing to the development of public-domain curriculum in their discipline.

    2. Re:Free Curriculum Foundation? by khipu · · Score: 5, Insightful

      There are plenty of good, free and low-cost textbooks, and many professors use them.

      But, given that students are willing to pay tens of thousands per year to go to college in the first place, a few hundreds dollars in books hardly make a big difference.

    3. Re:Free Curriculum Foundation? by meerling · · Score: 4, Interesting

      I know two professors, one in math, currently working on open source text books at my local college. I know the math prof is looking for a stable book (not reshuffling the order of the problems and calling it a new edition), the ability to correct errors (some of these books have had the same blatant errors for over a decade), the ability to customize for your curriculum (the regular publishers won't even fix obvious errors, so nobody expects them to listen to requests/suggestions), and a reasonable cost (whatever printing costs if you don't have a laptop or something since $120 for a math book loaded with errors is INSANE.)

      There are plenty of free or open source textbooks listed if you search, and whether it's appropriate for your class depends on your requirements. Other than that, I can't say anything about the quality of all of them, only the half dozen I've reviewed which looked just fine, but the teachers hadn't gone through them yet.

    4. Re:Free Curriculum Foundation? by Darkness404 · · Score: 3, Insightful

      It has, the classroom method for instruction and knowledge is dead. It died when the internet came about. The thing is though, college is not about instruction it is about getting a piece of paper to get hired (or an experience).

      Just about every single skill can be learned for free online. Want to know about British history? Identify Roman coins? Learn C#? You can find that for free online. Unless you have a degree though, chances are you aren't going to make it past the first round of screening HR does.

      --
      Taxation is legalized theft, no more, no less.
    5. Re:Free Curriculum Foundation? by Anonymous Coward · · Score: 2, Insightful

      You don't go to a four-year college to learn a skill... if that's what you're after, you're missing the point.

      Everything I've seen in open course ware teaches introductory material at most. Yes, you can learn C# on-line. But knowing a language and knowing how to work in a team or make high quality software come only through doing it. You can go through a trial by fire by working with an open source project, or go to a university and have a professor facilitate a project, evaluating you along the way and correcting your misconceptions before it's too late.

      University isn't about sticking around for four years and then "knowing how to program". It's about developing higher-order thinking skills, intuition, professional interpersonal skills, and the ability to accurately evaluate oneself and others. The classroom method is dead because professors don't give a damn about teaching students these sorts of things anymore. The Internet had nothing to do with it.

    6. Re:Free Curriculum Foundation? by progician · · Score: 4, Informative

      You are right, but then it would make sense that Universities, instead of costing the price of a family house, would transform to a professional social network, where individuals with different skills could organize different study groups, and academic reference would be the list of workgroups with their freely available, freely usable published results, depending on the field.

      It is insane to see that while the cost of distributing information is rapidly falling, the costs of education is steadily growing.

    7. Re:Free Curriculum Foundation? by supercrisp · · Score: 3, Interesting

      You don't have to make tenure and promotion "contingent" upon developing public-domain materials. You can just encourage it by allowing such work to count toward tenure. Such work is very time-consuming, especially if you're doing it for some form of publication because you have to make sure you're not infringing and that the work is near enough to perfect that it doesn't make you or the institution look bad in some way. All too often preparation of teaching materials counts for little or nothing, and the publication of online or free stuff or self-published stuff isn't regarded as counting for much. Frankly it often doesn't; it's just too easy for a lazy person to "publish" some twaddle as they look for promotion. So, in addition to allowing this stuff to count toward t&p, you also need some editorial oversight, which means you need some institution to pay for the people who will be doing that work, even if that "pay" is just release time.

    8. Re:Free Curriculum Foundation? by supercrisp · · Score: 2

      I've looked through textbooks in english and composition, and they're not very useful because so much of what you teach is protected in some way. And the sort of things that can be published, grammar guides and such, still aren't all that great. This area of endeavor is in its infancy. And I'm glad to see so many younger people interested in it. I look forward to seeing you all invest your time and energy in helping to produce high-quality, open access instructional materials.

  3. Wow, nice. by Anonymous Coward · · Score: 2, Interesting

    More DRM nonsense. Stop being so paranoid about piracy that you hurt your own customers.

    1. Re:Wow, nice. by Anonymous Coward · · Score: 3, Interesting

      Then I sure hope people have a "right" to remove any nonsensical DRM and use their own property in any way they wish. After someone has bought it from you, you're powerless (or should be, but remember, so-called "rights" can be given or taken away).

    2. Re:Wow, nice. by icebike · · Score: 5, Interesting

      Authors have a *right* to direct how their work is used.

      Not content with the right to control sales, now they want you to prove you bought it
      in order to take the class.

      What happens when roommates decide to share the book? Will they let two students register
      with the same book id number for the useless on-line material (which only exists to get your book ID number)?

      I shared several books with a roomie in college, because we took the courses at different time of the day.
      The hall book-handoff was a daily ritual. We split the price of the book, and resold it splitting the proceeds.

      If this scheme locks out Book IDs that were used previously, what happens to the first sale doctrine?

      --
      Sig Battery depleted. Reverting to safe mode.
    3. Re:Wow, nice. by Fjandr · · Score: 3, Informative

      At least according to the 9th Circuit in Vernor v. Autodesk, there is no first sale doctrine if the transaction includes a licensing agreement which substantially restricts (such as prohibiting subsequent transfer of the access license) the rights of the purchaser. All this, even if the transaction is treated as a straight-up sale in all other regards by both parties (full upfront payment with no obligation to return the material after a time, and no further obligations on the part of the seller).

      As a result, any sale can be converted to a license simply by posting a licensing agreement which includes restrictive terms. This latter part is not idle speculation, but is actually specifically noted by the 9th Circuit order. Given that the 9th Circuit declined an en banc hearing on the results and SCOTUS declined certiorari, the ruling will stand unchallenged until the unlikely event that another Circuit issues an opposing ruling. Given that the US judiciary has evolved from ruling on function (looks like a duck, quacks like a duck, probably a duck) over form (looks like a duck, quacks like a duck, appellant claims it's a cat, probably a cat), it's unlikely SCOTUS would reverse this ruling even if it somehow ends up in front of them though.

    4. Re:Wow, nice. by Fjandr · · Score: 2

      Since when?

      Since Sept 10th, 2010.

      Vernor v. Autodesk, Inc., 621 F. 3d 1102 - 2010

    5. Re:Wow, nice. by Fjandr · · Score: 4, Informative

      I agree. The 9th Circuit judges who heard the case I listed do not.

      Specifically:

      The ALA fears that the software industry’s licensing practices could be adopted by other copyright owners, including book publishers, record
      labels, and movie studios.

      These are serious contentions on both sides, but they do not alter our conclusion that our precedent from Wise through the MAI trio requires the result we reach. Congress is free, of course, to modify the first sale doctrine and the essential step defense if it deems these or other policy considerations to require a different approach.

      The Court tacitly agrees with the ALA's claims as to the potential effects of the ruling on other media should the licensing practices of the software industry be adopted by other distributors outside the software industry. Book sales are only different because the use of licensing has not been adopted. Without Congressional intervention, book and video sellers are free to adopt the conventions of software licensing and end secondary markets.

    6. Re:Wow, nice. by supercrisp · · Score: 2

      Keep in mind that "they" is not the faculty member. It's the publisher. The publishers sucker faculty into these deals with promises that aren't kept. For example one major publisher told my department two years ago that if the department signed a two-year contract, they'd get this wonderful system with grade tracking, self-grading exercises, wonderful textbooks, an integrated clicker system, and all of it would integrate with Blackboard and our online grade entry system. All we had to do was require our students to buy an expensive text with one of these serial numbers you use to log into the fabulous educational wonderland that the publisher was providing. So we did that. And very little of that online stuff worked, and the publisher's rep couldn't do anything about it but wave her hands around and make empty promises. So I contacted a friend in the industry, who works for a competing publisher, and he told me that this is pretty common across the board, even in his company. And that the idea is "vertical integration" and that the end goal is moving all the content--including faculty content--to packages the publishers can sell. I could continue to rant about this, but I will only say that our department dropped this previous publisher like a hot rock this year when the contract expired, and we're no longer using any books that come with these phony baloney serial numbers, and the texts we're requiring all cost about half of the one from that previous publisher.

  4. Students are PAYING CUSTOMERS and should demand... by couchslug · · Score: 5, Insightful

    ...Free and Open textbooks for all their courses.

    School is PURELY a financial transaction, but schools want to fuck their customers good and hard. (I found working in a community college highly educational.) They want to make programs fit available funding, and Pell Grant farming is standard.

    The profits made on books are calculated as part of the profit of each program. They are NOT provided by the school book store as a convenience, unless you consider anal rape convenient.

    --
    "This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
  5. Course fees? by SurfaceMount · · Score: 5, Insightful

    Whatever happened to just charging a fee for attending the course?
    Stop trying to make extra money through textbook "upsells". Be upfront and honest by charging the book fee as part of the upfront course fees and give each student a copy.

    1. Re:Course fees? by couchslug · · Score: 3, Informative

      Unless customers DEMAND change it won't happen because book sales are highly profitable.

      College is a business. Business is war.

      --
      "This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
    2. Re:Course fees? by Githaron · · Score: 3, Interesting

      When I was in college, I bought all my books online with most of them being brand new at half the price the college bookstore was charging for used. That said, most of the books were still ridiculously expensive. The reason colleges get away with their high book prices is because many of the students are getting their books paid for by the government or parents.

    3. Re:Course fees? by lahvak · · Score: 2

      You are (most of the time) talking about different entities extracting the fees. Tuition money goes to the college. The money you pay for a textbook goes to the textbook publisher.

      Back when price of textbooks were reasonable, professors would select textbooks according to their contents. Since in some areas there are many textbooks with comparable contents, publishers started competing in providing "perks" to teachers with their textbook: a test generator, an online gradebook, an online homework system etc. Now there are teachers who select textbook not so much by contents, but by availability of such "additions". Now publishers are trying to abuse this system to stop people from byuing what they call "pirated" (meaning used) textbooks. Some professors are not aware of that, and the publishers keep using the "additions" and "perks" to trick them into selecting such textbooks. Some of us are very aware of that problem, and refuse to ever assign a book like that. I have never heard about a professor or a college actually conspiring with a publisher in order to extract more money from students. It may actually be illegeal to do so.

      --
      AccountKiller
  6. Oh, and world peace too. by Anonymous Coward · · Score: 2, Interesting

    Not surprisingly, Rick Falkvinge, the founder of the Pirate Party, says he's also against such a system.

    "The notion that academics go to lengths to prevent the spread of knowledge comes close to sacrilegious," he wrote in an e-mail to Ars. "In particular, it is a complete conflict of interest between the profits of old-guard publishers and the real mission of academia—to spread knowledge as widely as possible."

    The high cost of education in general prevents the "wide spread of knowledge" as well.

  7. Re:Students are PAYING CUSTOMERS and should demand by Anonymous Coward · · Score: 2, Interesting

    ...Free and Open textbooks for all their courses.

    This is exactly what OpenStax College Physics is providing: a popular but out of print textbook that was picked up by a couple of charitable organization (incl. Bill & Melinda Gates, I admit) and republished under a Creative Commons license. I will teach 170 pre-med students from this 'textbook' in the fall.

    I do disagree vehemently with the rest of your comment!

  8. Old news by Eightbitgnosis · · Score: 4, Informative

    I'm in my sophomore year of college, and I've already taken half a dozen classes requiring an $80 online pass.

    1. Re:Old news by EmperorArthur · · Score: 3, Interesting

      I'm right there with you.

      I've had several courses were all the homework was online. You could not pass the class without a code that came with a new textbook.

      Of course you could buy that code separately, but it cost half as much as the textbook itself. This is very similar to game companies using online passes to attempt to get rid of the used market.

      One other thing I should mention about all of these online homework systems. They SUCK. I have yet to see a truly good implementation of such a system. I'm not disparaging online homework or anything like that, but it's obvious that whoever designs these things doesn't understand education. Don't even get me started on the lack of partial credit for upper level physics problems. Fortunately, websites like Khan Academy are coming out with tools that are easy to use, and replace the traditional homework system. They're even managing to do it without earning the hate of every college student forced to put up with this crap.

      --
      So lets pretend that we've just completed writing this code, as opposed to having just completed sabotaging it -Altera
  9. "Professors have few incentives... by rsilvergun · · Score: 2

    ...to make it more difficult and to compel students even more than they already are to buy textbooks"

    Bwahahahahahahahahahahaha!

    Oh God... he was serious, wasn't he?

    Uh, for the record, my bro's French text was a) useless and b) written by the department head. A copy was ordered for each and every student, and they sat in the bookstore all year until the teacher was advised that no one would receive their grades until they were gone because, hey, how could anyone have gotten through the coursework w/o the textbook? Right?

    --
    Hi! I make Firefox Plug-ins. Check 'em out @ https://addons.mozilla.org/en-US/firefox/addon/youtube-mp3-podcaster/
    1. Re:"Professors have few incentives... by Githaron · · Score: 2

      The college told you that you wouldn't get a grade if everyone in the class didn't buy a text book written by the teacher? It sounds like you should have gotten a lawyer.

  10. Re:example from an MIT course by k(wi)r(kipedia) · · Score: 2, Insightful

    No teacher would make financial payments linked to grades.

    That's a very rosy view of the academe you have there. Let me guess, you went to an expensive university where the teachers' salaries are high enough that students' grades are non-"negotiable".

  11. Re:Failure is guaranteed by mlts · · Score: 2

    My cynical self says that is true, but I remember in the past people saying that Internet censorship was impossible. Now, it is commonplace.

    I wouldn't be surprised if there is a son-of-ACTA bill brewing, where it wouldn't just do encryption, but signatures, so if something detects an unencrypted item (music/book/video/program), it would shut the device down, phone home, and call the local popo on a "IP tampering" violation.

    DRM is improving. It took a long time for the iPhone 4s to be jailbroken. It took almost five years for any type of action to crack the PS3. Blu-Ray is still a cat and mouse game.

    With a law and reactive infrastructure in place that would not just disable devices that are tampered with (think XBL bans), but also accounts. Then add criminal penalties onto it, and it wouldn't be surprising to see something put into place that would be robust without any cracks.

    Yes, in theory, having Bob and Charlie be the same person is wrong, but throw enough tamper-resistant hardware at the problem, and it will work, just like how deploying censorware has effectively worked.

  12. Re:Students are PAYING CUSTOMERS and should demand by Der+Huhn+Teufel · · Score: 3, Interesting

    Students can get up to $5500 per year in government aid depending on their need that they do not have to pay back. The government also backs loans at much lower interest rates available elsewhere. Once virtually everyone has access to large amounts of money for college, colleges can easily raise their rate and still have a large volume of students attending - and this is seen by the fact that almost every college raises their tuition and fees far in excess of the rate of inflation every year. Colleges practically bleed money, and very few of them have any semblance of balanced accounting.

  13. MPAA frames the news by tepples · · Score: 2

    the government [...] seems to be heavily controlled by the copyright cartels. How the hell did we let these people get this much money and power?

    Getting elected to U.S. federal office requires the cooperation of the national news media. The national news media have become co-owned by the movie studios. Therefore, the movie studios get to frame the discussion any way they want.

  14. When Will Publishers Get It? by Dr_Ish · · Score: 4, Interesting

    This seems typical of the world of publishing today. Many publishers are merely money making machines, with little regard for either students, or knowledge. Unfortunately, as publishers adopt more and more predatory practices, they end up pissing off both students and professors. There is one major academic publisher in my field Cengage (who operate under many other names), whose books I now refuse to use. They update editions every three years, doing little more than changing page numbers and changing the order of exercises. Each new edition comes with a substantial price hike and force me to rework sections of my classes. The result of this? I now have the equivalent of an on-line text I have developed myself over the years. So, they have lost the business.

    It is the very same publishing houses who are mean about sending us desk copies and charge us for them, if we do not adopt their texts. Again, they end up as losers, as there is no incentive to use their texts. They also get pissy when we sell the books that they send to us, without our asking. This again is silly. In the State in which I teach, professors have not had a pay rise in four years, so a few bucks to buy lunch was a welcome perk. Stopping this perk does not make us like them any more.

    That being said, not all publishers are like this. Some keep their editions for a long time and do not change much when they bring out new editions. A good example of this is Oxford University Press. So, when I need to use a text for a class, all the business goes to OUP. This is the correct way to do business in publishing. It should not be about quarterly results, but rather about building and maintaining long term relationships. The technological innovation described in the post is just yet another step in the wrong direction. Eventually though, publishers will have to work out the errors of their ways, or perish./p

  15. Re:Then why file for a patent? by similar_name · · Score: 5, Insightful

    They think we live in fairy land

    I think they live in a fairy land. From the summary.

    ...enhancing the overarching academic mission to create and disseminate knowledge.

    The idea that protecting copyright helps encourage the creation process is at least a valid idea. However I don't see any way that restricting the ability to copy that knowledge somehow helps disseminate it.

  16. Sometimes a patent can be good. by jbeaupre · · Score: 2

    Since patents are used to limit the number of people who can do something, having a patent on something stupid will lead to limitations on the number of people doing said stupid thing.

    The alternative is said stupid thing being a freely available technique that can be implemented at any time by anyone at no cost.

    --
    The world is made by those who show up for the job.
  17. Re:Then why file for a patent? by davester666 · · Score: 3, Interesting

    Yeah. Enforcing copyright laws is defined by restricting the dissemination of knowledge.

    --
    Sleep your way to a whiter smile...date a dentist!
  18. Right to Read by Fjandr · · Score: 4, Informative

    Not that I'm otherwise a huge fan of RMS, but I'm surprised I haven't seen any reference to the "Right to Read" in this discussion yet. Given the direction US copyright and education are going, it gets scarily closer every day.

    http://www.gnu.org/philosophy/right-to-read.html

  19. Re:Then why file for a patent? by next_ghost · · Score: 2

    The idea that protecting copyright helps encourage the creation process is at least a valid idea.

    Maybe technically valid, but still completely wrong. For example if Terry Pratchett was not allowed to use public domain works as a basis for his own Discworld series, the Discworld books would either suck or not exist at all.

  20. Forced pay even if you don't want the book by Hentes · · Score: 2

    In the original sense of the word, forcing someone to give you their money is textbook piracy.

  21. Re:example from an MIT course by Ginger+Unicorn · · Score: 3, Funny

    If internet porn has taught me anything, and it has, it's that you don't need money to negotiate grades with your college professor.

    --
    (1.21 gigawatts) / (88 miles per hour) = 30 757 874 newtons
  22. Book purchases made up 30% of my fees by sirlark · · Score: 2

    In my first year as an undergraduate in South Africa (where fees are probably fairly cheap compared to the rest of the world) I paid approximately $1000 for the year. I needed to buy 7 books overall, costing a total of approximately $350 (bought new). This was in 1997. All the books were imported and the prices based mostly on the US price, plus the usual healthy markup and taxes. So, yes! It makes a bloody difference. One book was more than a month's rent for me. The developing world sure could use some free text-books, and quite frankly, the developing world should take the lead here too. There are some excellent professor's who develop world class text books teaching at universities in the third world. third world governments should be subsidizing THEM to write these materials, as it will save on education costs in the long run.

  23. Re:Wow. by mjr167 · · Score: 2

    You assume proffessors are there to teach. Teaching is that annoying thing that gets in the way fo thier real job- research and publishing papers.

  24. Re:Students are PAYING CUSTOMERS and should demand by supercrisp · · Score: 2

    I don't know where you worked, but your statement doesn't reflect my years of experience teaching at four different universities and one community college. Every higher-ed institution I've worked at, attended, or considered as an employer had a bookstore that was run by an external vendor. The money from the books doesn't go back to the institution. There is sometimes a sort of kickback deal where a percentage of sales will go back to a specific department. I and many other _professors_ consider that shady, and we don't like it, but it's often thrust upon us. At my current institution we just got out of a contract that had such a provision, and we're glad to be out of it. The sort of publisher who needs to offer you kickbacks is not the type providing a good product. By the way, we used the kickbacks to buy photocopier paper and some computers for the honors students' program; we didn't otherwise have the funding. On the issue of "Pell Grant farming" and programs fitting available funding, hell yes that's happening. What do you want to do? Pay higher tuition instead? Every school I've worked at in the last few years has been shedding instructional faculty because we don't have money. Enrollments are up, demands on us for tech, parking, new buildings, entertainment in the dorms, those are all up. But state and federal funding has dropped steadily for 30 years. Our endowments and investments tanked in the "great recession." So where are we going to turn? We'll jack up tuition as much as we can without cutting enrollments, and we'll "farm" what little public money is left.

  25. Re:Professors have a reason by supercrisp · · Score: 2

    Yeah, because that few bucks you get on a hundred dollar textbook is really worth alienating all your students. The money comes when the textbook is good enough to be adopted by other faculty at other institutions. And check this out: a professor might well write a book that he or she thinks is the best book for the class. There's also a very high incentive not to write a crappy book and look like a dumbass in front of all your colleagues.

  26. Re:Then why file for a patent? by next_ghost · · Score: 2

    Could you give more details on this? I haven't read his books, but based on what I've heard of the books, they parody (or take inspiration from) certain aspects of other author's books - including J.R.R. Tolkien. Wikipedia says that the Discworld books were published from 1983 until the present. J.R.R. Tolkien's "Lord of the Rings" books were written between 1937 and 1949 and published in 1937, 1954, 1955. Presumably, they were (and still are) under copyright - which means they were not public domain when Terry Pratchett parodied them.

    I've read the entire main series of Discworld books except Snuff and Raising Taxes and Pratchett really does parody a lot of older works, Shakespeare in particular, though I haven't found anything that would remind me of Tolkien. There are two Shakespeare parody books: Wyrd Sisters (combination of Macbeth and Hamlet, the first spoken line in Pratchett's book is verbatim first spoken line from Macbeth) and Lords and Ladies (I believe it's a parody of A Midsummer Night's Dream but I'm not completely sure). Shakespeare also appears as a character in The Science of Discworld II: The Globe where Discworld elves try to become rulers of our world by influencing Shakespeare while he writes A Midsummer Night's Dream. Smaller references to Shakespeare also appear throughout other books. Other parodies of older works are Eric (parody of Faust, even the book cover points that out), Witches Abroad (multiple fairy tales including Cinderella), Maskerade (parody of The Phantom of the Opera) and Carpe Jugulum (I think it's a parody of Stoker's Dracula but it might be a parody of vampire stories in general). A lot of Pratchett's books also parody history and current culture themes, for example: Pyramids (parody of ancient Egypt), Moving Pictures (early years of Hollywood), Small Gods (Catholic church during the time of inquisition), Soul Music (life of Elvis Presley), Interesting Times (invasion of Genghis Khan into China), Hogfather (parody of Christmas and Santa Claus), The Last Continent (parody of Australia), The Truth (invention of movable type printing press) and Unseen Academicals (parody of football/soccer and its fans).