His book "The Planiverse" was one of the first books I read as a kid that really made me think. I was fascinated by his detailed descriptions of a 2D universe and its implications for how that would affect biology, society, and everything else.
+1 I LOVED it. Huge, huge, influential book in my thinking when I read it at 11 or 12. It led to interest in world simulations, sociology and how it relates to physical structures and limits, physics simulations, and so much more.
One of my favourites. I had a nice wide copy as a kid and recently bought a new one for my kid. Was disappointed in the small blurry reproduction of the diagrams. So get a used copy!
