The Enchanted Files: Diary of a Mad Brownie by Bruce Coville. (Listening Library, 2015)
Suggested for ages 8-12. 298 minutes.
Diary of a Mad Brownie is the first book in Bruce Coville's new series, The Enchanted Files. I listened to the audio book, and I can tell you that it was the most fun I've had listening in a long time. And it's read by a full cast!
My copy of the book was supplied by AudioFile Magazine.