First of all I'd suggest going to see the movie, "Metallica - Some Kind of Monster" or getting it on DVD in Jan when it's out. The film is obviously the precursor to this book, so if you haven't seen the film you'd be a little confused in places with this book.
The book is written by one of the filmmakers, Joe Berlinger. He is also quite a good writer, heartfelt and to-the-point, and picks up on the little details that others would have missed. When I got this book, I couldn't put it down. I am a die-hard fan of Metallica, but I would recommend this to anyone who likes to read, watch films, or enjoy an argument!! The book goes into details about the filming, the band, the background, the conflict, that the film simply didn't have time to incorporate - and from this book I think you get an even truer sense of just how much trouble Metallica were in, and how fantastically well they've done to come through it. I think also, filmmakers and anyone into cinema verite, documentaries etc will enjoy the book as there are many 'behind-the-scenes' details of the filmmaking process.
From Berlinger's perspective, he highlights how 'hypocritical' he felt in filming this potential self-destruction - as a person, as a friend, as an observer he wanted them to get along, and resolve their issues; yet as a filmmaker he knew that conflict and arguments made for a gripping film, and so part of him wanted them to fight and destroy each other. He goes into his reasons for making the film the way they (Berlinger and his filming partner, Bruce Sinofsky) did, and how close they were to giving up on the film project altogether.
There's a lot more detail in the book - more than in the film - about James' rehab stint and how the band coped with him gone, and also the infamous talk/therapy between Lars Ulrich (drummer) and famous ex-guitarist Dave Mustaine (now of Megadeth). There's more detail into Lars/Dave's previous friendship and how they 'fell out' and how it all escalated and how/why Dave complained when they included that scene after he asked for it to be cut from the film.
Berlinger also tells how the conflict Metallica were facing made him face up to his failing relationship with long-term co-filmmaker Sinofsky, and how the two friends were barely on speaking terms, and it's clear that their relationship was saved by doing this film too.
This is a must-have for the Metallica fan, but also just a darn good read! An insight into human failings and selfishness, friendships and business, filmmaking and therapy - and it left me feeling amazed that a band would go through so much pain and hurt and take the bold step in advertising it - warts and all - to the world.