I couldn't put it down, a friend loaned it to me and I read it within 24 hours. Amazing what a tiny town Boston is, even a relatively obscure person like myself has had interactions with many of the players in this book. (I was threatened by some south boston lackey supposedly of Whitey's years ago, but in deposition he was described as a crack head)
I was at a breakfast last year at Boston College High School where Billy spoke, and the homage paid to him by the local pols was amazing for someone who was clearly a dictator, probably corrupt, and maybe involved in criminal activity. But, he brought home the bacon and that seems to be all that politics is about now, both locally and nationally.
I highly recommend it.