I have always liked his columns in Motorcycle Consumer News, and so some of what was in there was familiar. It's nice to have it all together, by topic. He's a bit alarmist (by my nonexpert perspective) on things like antibiotics, but most of what he tells is quite relevant to motorcyclists, like what to do immediately if you get THIS kind of wound or whatever. But there's other good stuff not necessarily specific to motorcycling, and a lot of neat anecdotes and advice for dealing with hospital staff, and observations about the kinds of stuff he sees in his office.
It's possible that after reading the book you will want to tell your doctor to check for some other diagnosis than what you're given initially. That kind of information is always valuable. Your doc has finite time with you, and how many of us have left his/her office thinking "I should have mentioned this too...."
flash is an enjoyable author and if you have interest in the topic, it's a recommended book.
And how often to you get to read an author whose name really is written all lower-case?