My opinion of Shmuely Boteach as a shameless publicity seeker notwithstanding, I note that neither myself nor any of the other posters have actually read the book. Henry Kissenger is famously quoted as saying “even paranoids have enemies”. A correlary of that concept might be that even jerks like Boteach might occasionally say something worthwhile.
Also, whether true or not, the possibility of the subject of Shmuelies book being a ” a wholly-observant, Pharisaic Rabbi” isn’t as far fetched as it seems based on events of the recent past.