Candlelight, I also recommend the following:
Is It You, Me, or Adult A.D.D.?
by Gina Pera
Outside the Box: Rethinking ADD/ADHD in Children and Adults—A Practical Guide
by Thomas E. Brown, Ph.D.
Like Russell Barkley, these two authors do not sugar-coat the truth of ADHD yet are empathetic and offer practical suggestions. If sustained reading is difficult, all three (Barkley, Brown and Pera) have videos on YouTube and audiobooks. Barkley’s videos are particularly noteworthy.