The Secret Garden - This is my new favorite book, and it's a long one. A little girl finds a secret garden and a whole new self in the process. I can't recommend it highly enough. I loved the narrator and the story. It's the perfect package.
The Little House on the Prairie series - We have listened to every book in the series twice, and it brings one of our favorite book series to life in a way that we hadn't experienced before. I love love love love this series of audio books.