The DIY Book Scanner
azoblue writes "Daniel Reetz did not want to lug around heavy textbooks, so he built a book scanner to create digital copies. '... over three days, and for about $300, he lashed together two lights, two Canon Powershot A590 cameras, a few pieces of acrylic and some chunks of wood to create a book scanner that's fast enough to scan a 400-page book in about 20 minutes (PDF). To use it, he simply loads in a book and presses a button, then turns the page and presses the button again. Each press of the button captures two pages, and when he's done, software on Reetz's computer converts the book into a PDF file. The Reetz DIY book scanner isn't automated — you still need to stand by it to turn the pages. But it's fast and inexpensive.'"
You must not have ever gone to college. A textbook for $15? Get real.
yeah, but you have to press 2 buttons and then lift your two cameras with your 4 sided PMMA/perspex/plexiglass box every time - he has a hinged L-shaped piece of perspex and one button - a more elegant solution - half the button presses, the cameras don't move and less weight.
http://www.geocities.jp/takascience/lego/fabs_en.html
turning the pages and scanning is childs play