This book explains APD in a way to make it easier to identify and to understand. My son has APD and I know if you have more knowledge about APD you will understand your child better. If your child has a speech delay, not responding when talked to or not listening, easily distracted, have problems following instructions, often say what or huh, then you should read this book. APD is often misdiagnosed. About 7% of school children have some sort of auditory processing problems.