An interesting theory exposed with a lot of examples, which I'm too old now to explore at the proper depth. Perhaps could be useful follow the book with a personal computer, writing code and testing it step by step.
I believe Wolfram read at a speed that is definitely beyond yours and mine, that's why the book is definitely too thick for almost everyone. There's a shorter version on his site which is more accessible. But if you like some awesome renderings, the book is not a bad investment....Continua