Social Rules for Kids gets a HUGE thumbs up from me. It's good for children who are not picking up on social cues for any reason. Made a huge difference for my ADHDer. I suspect the intended audience is autism spectrum.
Driven to Distraction is for adults, mostly about adult ADHD. I wouldn't use that one. Smart but Scattered is a equal-quality book for parents of kids with ADHD. It's intended for average and up, but pretty much average intelligence.
I second The Explosive Child, and just requested Raising Human Begins from the library thanks to @ElizabethN's suggestion. (Thank you!)
I have found that reward systems SERIOUSLY backfire for ADHD, so I would add Punished by Rewards and/or Unconditional Parenting. Punished by Rewards is more theoretical and uses many adult/workplace examples. It does not give parenting advice. However, it was a great foundation for Unconditional Parenting.
