Why Are Tech Books So Expensive?

Hellboy0101 asks: "Once again, I found myself sifting through my local Barnes and Noble for technical books. I don't do this very often, and apparently just enough time passes for me forget how expensive these books are. I can't help but think it's the fleecing of technology workers and enthusiasts, much like OEMs clearly take advantage of gamers with their unreasonably high prices. There certainly are some glaring and welcome exceptions to this rule. But my question is this: Why do they charge this much for books, and are we actually part of the problem by continuing to pay it?"