BookMooch.com is a great site for finding all types of books. After you list your first 10 books, you get 1 full credit. Each book is worth 1/10 when you post it and 1/10 when you agree to mail out a book that has been requested from you. I listed books last night and already have six requested to be mailed out. A $1.40 to mail is a deal and I get "new" books to read. It's a great budget idea, especially for kids books since they seem to go through them so fast. I have gotten a huge stash of "new" books for my daycare class.