It is far more of a text book than ID book, to be sure. And it does make generalizations about different types of behaviors (feeding, "not fighting", etc) and then behaviors specific to certain species. But I highly recommend you purchase it next chance you get.
The more we understand animal behaviors the more interesting our dive.
Even the most "mundane" of dives can be fascinating when you go from "
look at that bunch of shrimp hanging out together" to
"
Wow! That must be a fishy [-]car wash[/-] cleaning station! I bet if I'm patient enough I'll see someone come along to get cleaned!"
I know ... say it ...