Fuzzy Mud by Louis Sachar, winner of the Newbery Medal and National Book Award for Holes. Narrated by Kathleen McInerny with a full cast and an author's note read by Sachar himself. (Listening Library, 2015)
Target audience: Grades 5 and up
I reviewed Fuzzy Mud for AudioFile Magazine, and loved it. As I should have expected from Louis Sachar, there is much more to it than I first expected. It's a sci-fi, adventure thriller,that focuses on the very broad concept of ecology as well as the more intimate problem of bullying. A link to my review for AudioFile Magazine is here. [http://www.audiofilemagazine.com/reviews/read/104469/]
I highly recommend it.