Wattpad has a lot of books and all of them are free! The books there are not usually published books (although quite a few have been published due to their popularity on wattpad) but instead are books written by users on the site. Sure, there is a lot of fanfiction and cliché teen romance, but if you look a bit deeper, there are some really well-written books that easily could be a proper published book. If you're into fantasy, I could recommend some good books if you'd like?