This book is full of photos of Bob sliding old cars around on the track, and posing with other great old drivers. Some of the anecdotes are real hooters. But it's skinny on the "how to" parts. There's a lot of discussion about setting up your seat and pedals for a comfortable and efficient driving position, but not much about the specifics of choosing a line for this corner, in this car, in this weather, today. Not much about footwork or other aspects of driving technique, not much about car set-up, and nearly nothing about the physics underlying it all. A few glancing blows at topics like contact patches, but disappointingly little.
Skip Barber's "Going Faster" is a better textbook, especially for someone like me, an engineer with an analytical mindset.
If you want a driving textbook, get Barber's. If you want driving stories, get Bondurant's.