fiction and non-fiction
gago
Fiction (story/not real) and Non-Fiction (factual/real). edit: paperback vs hardback
Fiction and non-fiction are the two main classes.
Basically, you reach for a book in the library with your hand. So i suppose the two ways are; 'standing on the floor' or 'standing on a ladder' if the book is on a high shelf.
How to Get Free e-Books from Your Local Library
Free Books for Your Kindle
Free E-book Lending on Open Library
Amazon to Launch Kindle Lending Library?