At Star Wars Celebration in Anaheim, Del Rey announced that Alan Dean Foster would be writing the novelization of Star Wars: The Force Awakens, which was announced as a digital e-book release for December 18th 2015, with a hardcover to follow in January 2016. As reported over at Jedi-Bibliothek, the Penguin Random House website now lists the hardcover for 5th January 2016. It will have approximately 320 pages and cost $28.
A cover has yet to be revealed. Pre-orders for the hardcover edition should be starting soon.