has a ton of books that have entered the public domain for reading. You have to be careful though, it takes longer for work to enter the public domain in the UK.
I forget how it goes exactly, I think it's 40 years from publishing or 7 years after author's death, whichever is later.
Just think though, there's a huge library of books out there that you can access with a few clicks. I have a small portion of my screen in work dedicated to WikiSource often, so that I can read when I think no one is looking.
Gods know I'd still prefer to turn the page than just scroll down a bit further.