Books for adults about autism by autistic adults:

The Autistic Survival Guide to Therapy by Steph Jones

Life as a Late-identified Autistic by Jackie Schuld

Self-care for Autistic People by Megan Anna Neff

A list of concepts and online resources that may help you understand autistic people better
 

Books for adults about AuDhD by AuDhD adults:

Welcome to AuDHD: How to Survive (and Thrive) as an adult with Autism and ADHD by Megan Griffith
 

Books for kids about autism by autistic kids:

The Secret Life of Rose by Jodie Clarke

 

Books for kids about ADHD by authors with ADHD:

A kids book about ADHD! By Elly Both
 

Other Resources about ADHD:

New York Times article about research on ADHD
 

Books about giftedness:

The Gifted Teen Survival Guide by Judy Galbraith