Desmond had a really funny quote to his father about playing tenor. He felt that the slack jawed embouchure of tenor was going to adversely affect his alto playing. I'm pretty sure the term he used was slack jawed.
The book took me a few days to get through. The main points were that Desmond was a pretty private guy who had his own private demons. Specifically, he liked to drink, smoke, and pop some pills. He also liked women. He liked talking about writing a book but never put the time in to do it. It's an interesting read overall. It's not an overly happy book or one filled with cheer leading in my opinion. The photos are great.