Free-book resource

Here's a good resource for out-of-copyright books, in multiple ebook format and often in audiobook too! "BooksShouldBeFree". It's well designed, good interface, and seems to have reference to a *lot* of books. I actually immediately found two books from one of my fave authors which I had no idea existed, even in audiobook format (via the volunteer-work site Librivox). I haven't sniffed out yet how it all works, but it seems it is legit, not a pirate site.