Unrelated to autism, but I would recommend these two as well, they're science communicators on YouTube and both books are very accessible to laypeople.
Existential Physics: A Scientist's Guide to Life's Biggest Questions by Dr. Sabine Hossenfelder Ph.D.: https://www.amazon.com/Existential-Physics-Scientists-Biggest-Questions/dp/1984879456/
A Brief History of Black Holes: And why nearly everything you know about them is wrong by Dr. Rebecca Smethurst Ph.D.: https://www.amazon.com/Brief-History-Black-Holes-everything/dp/1529086701