Free Educational Books
18000 Free Ebooks Online 
This site was the first to offer free online books (e-books). They help to set up and run operations the provide people with e-books free of charge. Not only are most of these books free of charge, but they are also free in terms of freedom, meaning you can freely distribute them and do anything else you please with them.
Ebooks Online!
Ebooks Directory is an online database of free e-books that are available for download. It is the biggest directory for free e-books and it also allows authors to submit free e-books for people to download and enjoy without any hassles.
Free Wildlife Fun Book
This site offers a free wildlife fun book, all you need to do is fill out a simple form and send it back to them and they will mail you your wildlife fun book free of charge. The book will teach you a lot of interesting facts and show you a ton of cool things you can do.
Online Books
Free-Book.co.uk is the ultimate directory for free online books. You can find anything from cooking books to computer language manuals; their main goal is to provide the most comprehensive listings available online. And by free they mean free, 100% free, no gimmicks or tricks where you only get part of the book for free, with them it’s either all or nothing.
The Online Books Page
The Online Books Page is an online resource that aims to give people access to tens of thousands of e-books absolutely free of charge. Their database is updated very frequently so you have the largest number of free e-books and the most up to date e-books available.
Treasure Island
This site offers the classic Treasure Island by Robert Louis Stevenson absolutely free of charge. Not only that but they also discuss the history of the book and all of the research that Robert Louis Stevenson did before writing the book. They also offer a lot of really cool retail items with very fair prices.