I got the Jonathan Adler Punctuation Cover (978161560062) since it's both very sturdy and cheaper than most.
I've already side-loaded 90 free books onto the device. These books have come from several places. In no particular order:
- The Lee County Public Library lets you borrow ebooks via Adobe Digital Editions (ADE) software. You can use ADE to side-load ebooks onto a nook.
- Project Gutenberg — the first place to go for books from the public domain. All of their books are now availible in ePub versions.
- Google Books, Some of the scans availible are in the public domain, and are therefore downloadable. Generally, the Gutenberug editions are a higher quality than the Google versions, since The Gutenberg tries to be an ideal textual copy of the book while Google tries to be a good representation a particular physical book.
- Many of the works of Cory Doctorow are availible as ePubs on his website, Craphound. I especially recommend Makers and Little Brother.
- The Baen Free Library — All copyrighted works which you may read for free, and all are availible as ePubs.
- The Baen CD Mirror — These files are also copyrighted but free to redistribute. The newer CDs have ePub files on them. The older CDs do not, but you can use a program like Calibre to covert file formats.