BookNutter is all about books, devoted to avid Book Nutts (readers). It’s a fairly new site and seems to be growing rapidly. The list of members has doubled in just the time since I joined, so could be a great place to discuss new books and even promote your own (no spamming of course). You’ll find everything there from Twilight to the latest from Indie authors. There are general discussion forums, book reviews, interviews with authors, even a page for poetry and more.
For Indies who’d like to submit a book to the site, there’s a handy BookNutter Book Submission form to fill out, a few boxes with the usual suspects: book title, description, URL and also Tweet Content, Keywords, Amazon URL and Additional URLs, which is a nice feature for getting links out there. (Smart to fill those with Barnes & Noble, Apple, Smashwords links, etc.)