Where can you find free downloadable Maximum Ride books?

The best site to use is 4shared.com, but you should really try to read them properly and not online.

4shared.com has the books in PDF or LIT formats, but does not seem to have the manga, and most online manga sites appear to have removed it from their collections but kept the descriptions. I can only assume this is the result of threats of litigation by the American publisher, Yen Press as ICE would have just taken over the site and shut it down.