I have a copy. It includes full analysis of a number of casino games, and the strategies appropriate to use against them if you are getting extra information from the dealer. For players who specialize in hole-card play (finding weak dealers who inadvertently expose cards that are supposed to be dealt face down), it's the bible.
Is it worth $515? That depends on your bankroll and skill level. It certainly could be.
A more important aspect of the book is that it really drives home the idea that profitable plays can exist in virtually any game under the right circumstances. For example, he has extensive coverage of the Big Six game, aka the "wheel of fortune". Yes, it's a sucker game. Usually, that is.