I have such a big happy grin reading your response 
Physics was the one field of science I really geeked out on in school. The stuff around velocity (measuring instantaneous velocity vs. the positional graph of an object over time, etc.) totally fascinated me and has stuck all these years later (when so many others of my early school lessons are lost to the embers of time 
).
As to the book, I’m a couple more chapters in and still enjoying it. Hoping to get a youngling in my life interested in collaborating on making a little game (or more than one) to get her engaged in coding.