My preorder arrived yesterday. I'm about halfway through it, it's mostly easy reading, but I can tell that it was assembled/ edited by a non-musician. There's a comprehension/coherency issue that is possibly going to bewilder people who have no experience with a saxophone. Detailed discussions about technique cut away to philosophical commentary without warning, and the go right back again.
Still, if you do know something about a saxophone, there is some wonderful stuff in here (especially about the potential for a mystical experience with multiphonics). And the philosophy shows a consistent and expanding thread from beginning to end.
A patient reader will enjoy this, I thinks. An impatient reader...Sonny Rollins is probably not for impatient people, readers or otherwise.