If you are a writer or an aspiring writer, I really think you will enjoy the site Book Glutton. You can upload your own work for free, and readers can go there and read and chat about your book right on the site. You can create groups and leave comments about the book you’re reading. It’s a great way to build buzz about your work. This site is best for writers of fiction and typical non-fiction trade books.
If you are a voracious reader, this is a great way to read some of the classics, like my favorite Jane Austen, for free. Check it out: http://bookglutton.com