Check out the free books you can enter to win on www.goodreads.com. They have a big variety of pre-released books offered by the authors and publishers. I've been lucky enough to win twice. You could be a winner too but you have to join Goodreads first. To see the long list of fiction and non-fiction books, just click on the explore tab for First Reads.
See you on Goodreads! You'll love it!