I thought this was an excellent read. Well researched and stretching into music engineering, history, international trends and more. The book does focus on the history of pop music, but that is told through of the story of how it was influenced by all genres, long before the Billboard was established. I definitely think this is worth reading if you are interested in music, celebrities, or history. 

It is obviously set by 20 specific songs, but each chapter connects those songs to other parts of musical history, societal context, and other artists. You get to jump around to a lot of different time periods, bands, producers and events as each song is connected to other things in multiple ways. 

Disclaimer: I received a gifted ARC and finished copy of this book from the publisher.