You guys can download Kindle for PC for free! I don't know if you are a fan of it or if you even know what it does but I have a Kindle and it's one of the things I bring with me when I travel.
Free Kindle for PC
I know there are 'other ways' to get your online books for free but fuck that. Anyway there's literally thousands and thousands of books available for you. Most of my books are History, Parenting, Children's Books and Computers & Internet.