I notice that you have a book by Lois McMaster Bujold (Barrayar), and list the rest of the series. These books are *MUCH* cheaper directly from the publisher and they come without copy protection. You can see the listing at:
http://www.webscription.net/s-13-loi...er-bujold.aspx
In order to get the best deal, you need to recognize the omnibus editions: ie multiple books rereleased as a single book. For example,
Miles Errant is "Borders of Infinity," Brothers in Arms, and "Mirror Dance." so you get all three for $5.
I 'think' the omnibus editions are: Miles Errant, Miles in Love, Miles Mystery and Mayhem, & Miles Mutants & Microbes