It's too long though, and is taken directly from taped conversations with the MM.
Some fans will automatically poo-poo it because it's from the MM, but these blinkered fans therefore miss out on a more rounded portrayal of the man and his life.
There are some good stories, some bad, some in between. It doesn't exactly add much of anything to the story though.
But ... just like What Happened and, yes, even the Goldman book! ... there are truths to be found among the dross.
If you can pick up a cheap, second-hand copy, grab it.