enjoyed this book. Each chapter is about a different "crossroad" or important moment in music history, and for me there was a good mix of stuff I knew about, had heard of, and had no idea about, which worked well. He goes off on quite a few tangents and asides, but I enjoyed that - it's conversational. If that annoys you, probably don't read this. 
I like a non-fiction book that has distinctly separate subjects for each chapter, as it means I dip into it instead of doing things like scrolling on my phone, and I can read a section in a lunch break without getting embroiled in an ongoing story and being late back. So this works really well in that way. I'm sure you could sit and read it all in one go if you wanted to but for me it was like a non-fiction version of a linked short story collection. 
I'm mostly glad I read this because I learned about Brian Eno's oblique strategies which has already provided me with loads of amusement.