Although I haven't read it yet, I bet it's a fairly interesting read. Mark was my college boyfriend - we met at Berkeley in 1991 - and a good friend for many years. I spoke with the author for an hour or so last May (from Coffs Harbour, no less), and he sounded like a good guy who's done his research, so I trust the book's going to a good one.
As a extra added incentive, readers may enjoy the picture of me with Mark at the Line Up restaurant in San Francisco, taken during a Folsom Street Fair in the early 1990s. Bonus!