Overall, I think it is an excellent book. The story flows well and definitely shows the main character John's frustration with not "getting it". It also explains what auditory processing disorder is in a simple, easy to understand way. There is even some great helpful advice for parents and teachers.
Of course, it doesn't explain everything about auditory processing disorder and neglects to point out the social difficulties that come with the disorder or some issues such as the fatigue that usually accompanies the disorder due to the extraordinary effort it takes to process auditory information. (Co-morbid common conditions such as dyslexia, discalculia, sensory processing disorder, or anything else are also not mentioned.) However, I believe the intent was to keep it simple as the audience is elementary aged children.
I would definitely recommend this book and I sincerely hope it is the first of many more to come.
