I've visited many free books site, and I like this one best so far. They have a really nice variety of genre's, including young readers. The other thing that impressed me is (well, every book that I have downloaded, anyway) there can be an average of some 32 different formats for each book, some more and some less, ranging from apple to zTXT. it's always nice to find a book they want or you enjoy and be able to share it with a friend or family member who has a different device than you. I cannot say as to whether or not there's a whole lotta ads on this website because I use adblock plus, but for now, it seems to be fairly clean.
Thousands of free ebooks, pre-formatted for reading on your computer, smartphone, iPod, or e-reading device - ePUB, Kindle, eReader, PDF, Plucker, iSilo, Doc, RTF, Mobipocket, Newton Paperback, and zTXT ebooks ready to go!