In the second book in a series by Gantos, a boy named Joey Pigza, who's ADHD requires medication in the form of a patch to keep him acting like a normal kid. Joey has high expectations about meeting his father for the first time in his life. When he arrives for the summer, however, events do not follow as Joey had planned.
I learned a lot about what it's like to be a child living with ADHD from this book.
This book was definitely not intended to be read by someone my age, but I really think that middle schoolers would enjoy this book, as well as the rest of the series.
Recommended for grades 6-8.
RVK in Town of Esopus