http://landers.bookbub.com/covers/?source=tabtbi4
BookBub is a daily email service that alerts readers to limited time promotions of free or deeply discounted eBooks across a variety of platforms like Amazon's Kindle store, Barnes & Noble's Nook store, Apple's iBookstore, and others.
Submitted by Jack Batterson
Thanks for the tip, Jack! I subscribe to BookBub and to SweetFreeBooks (http://sweetfreebooks.com/category/bookdeals/). They are a lot of fun! My favorite way to get good-quality free ebooks, though, is to check them out via the public library (http://overdrive.dbrl.org).