Maybe because the author's day job is the editor of an encyclopedia, this book also reads like a reference book. Organized mainly by record label, this is a detailed account of everyone who ever recorded anything that might be filed under soul. After a while though, it starts to gel together as some of the most important figures appear again and again. The chapter on dance crazes alone is worth it! Another cool thing about the book is that he goes all the way from the last days of doo-wop up til the early 80s ... there aren't many fans of, for example, Curtis Mayfield's songwriting and production work in the early 60s who appreciate the militant and meandering sounds of his later albums, but Pruter gives everyone a fair shake.
Also, this book made me re-think how the soul era ended. Other books had left me thinking that black people's taste in music changed... the end of the civil rights era, the hard poverty of the 80s and the Reagan 80s ideology making soul music seem corny and the more militant, or nihilistic hip hop taking its place. But this book tells the story of the business behind soul music, the small, independent record labels, and how they go out of business one by one. Without making any broad theoretical argument, Pruter shows how major labels scooped up the independents and then didn't know what to do with the artists. Soul music dies because the big media companies were incompetent. And thinking about it just now, I could argue that the same thing has happened to hip hop.