These are actually free to the public, as they're part of the gutenberg project :-) The real gold is between all the free ebooks offered at
www.gutenberg.org (click on browse categories in the left to see all the selections available) and the free audio books provided by
www.librivox.org, often available as a gutenberg's (sometimes illustrated) ebooks :-) Check it out - it's free gold, really!
Thanks for sharing this gem!