I have that book. Caon was my SO's thesis advisor. The interesting part about that book is that it also points out whether the gesture has a different meaning

I have that book. Caon was my SO's thesis advisor. The interesting part about that book is that it also points out whether the gesture has a different meaning in other cultures. For example it says the gesture for "OK" that you do by making a circle with your thumb and index finger has a vulgar meaning in Russia (iirc).