FYI -- If you are looking for free ebooks (and being current is not an issue) -- Project Gutenberg (
Project Gutenberg) provides online text files of public domain books. There are a variety of tools (such as ReaderWorks from OverDrive) that will take a text file and convert it to a format that can be read via Microsoft Reader. Or you can use MobiPocket publisher to convert the books for reading using MobiPocket or Microsoft Reader.