I am disappointed so many reviewers seem to regard Miles as a racist. Personally it seems to me he was born into a wealthy black family, son of intelligent and cultured parents, and wasn't prepared, as he often says, to take s--- from anyone particularly if they were white and doing it because he was black. That doesn't make him a racist, it makes him brave.
And contrary to one reviewer's comments, the book is full of stuff about the music, much of which I didn't understand because it was too technical. For anyone who knows anything about music, or who has studied it I should think this book would be fascinating.
For me too it was fascinating as a fine documenting of the history of jazz, and gives good insights into the character of many musicians, especially Parker and Coltrane. It also says a lot about the nature of racism in the USA much of which no doubt still holds.
Davis was an incredibly strong character, had to be to survive so many generations of jazz when so many didn't. He had to be decisive, I don't think this makes him unpleasant in itself although to me his attitudes to women were frankly primitive.
Despite this I found this an inspiring book and probably the best book I have read about jazz.