Google helps you get your learn on
When Google is not trying to eclipse the sun, they want to educate the masses (and its surprisingly not propaganda). The search giant has upped their “Project Gutenberg” efforts and are making hundreds of thousands of out-of-copyright books, which were previously available only for online searching and viewing, available to DOWNLOAD as a PDF, which you can then print and read at your leisure.
As a little tidbit, since we are all learning here, books are generally copyrighted for 70 years after an author’s death, so a vast majority of children’s classics will be available for the future generations.

uhm… gotta link?
http://www.google.com/books?hl=com