I searched, and didn't see a thread for Cutler's own book, which I am reading, and I got to say I am getting these beautiful inside stories on the 69 tour e.g, or the Hyde Park show, that I was hoping to experience in Keith's book.
Far as I can tell Sam wrote the book himself, and while he's no Ellroy or Gibson, I do like passages such as (In Mick Taylor's chapter):
"Where Keith was brash, and loved the sheer vulgarity of guitar riffs, Mick went for the more subtle feel, intricate and urbane. The pair managed to marry their individual styles and produce some wonderful musical offspring."
That is pretty descriptive.

here are a couple of the earlier threads about Cutler's book:
[www.iorr.org]
[www.iorr.org]