One of the more interesting books with historical anecdotes of others who were there as actual witnesses describe events firsthand. The first chapter or so is a tough read, describing his life and personal losses during the holocaust, but after that, the stories are great. There are two chapters (actually more) of note that I recommend the Led Zeppelin Oakland Coliseum event and Keith Richards shoes. No reason for me to ruin the rest of the story!
His contributions to the music industry are immense, and understanding how as a promoter of shows, made it work. His innovations in the San Francisco Bay Area show presentations (and beyond) are the blueprint for today's bigger forces like LiveNation.
Read the book, understand a man that some loved and others loathed, nothing is truly minced. (I'm trying to be objective without telling a story worth reading.
One thing that leads to a comment after reading, if Bill Graham is not in the Rock and Roll Hall of Fame, he should be.