$20 for a beautiful book and normally with really great stories, best deal ever if you'd like to read one particular author.
Specific books: Old Man and the Sea by Hemingway; Sphere, Jurassic Park, State of Fear, Prey, and The Lost World by Crichton; The Hobbit by Tolkien (gonna be reading The Lord of the Rings when I have some actual time); and Black Hawk Down by Bowdon.
I've got loads of books, best thing to do is go to a section in a bookstore that you want to read from, and grab a random book off the shelf.
Read the background stuff and the first chapter or so, and see if you're interested.
I end up buying at least one book every time I do that.