I know he's probably terrible to some people, but ever since I read The Testament by John Grisham, I have been hooked. I have read or listened to every single one of this adult books (didn't do the Theodore Boone ones). His writing has a way of sucking me into a story that I have trouble putting down. The other series I really enjoy listening to is the Girl with the Dragon Tattoo novels. The original author passed away, but the guy the estate selected to continue the stories has done a pretty good job. Of course... GAME OF THRONES