During my whole life I've dealt, lived with, and created several situations of anger - while I can't change the past, I know that the present has to be different.
I also have gone through many interpretations of this feeling, from the cartoonish (yet quite accurate) volcano-shaped creature in Inside Out (a must-see for people who really love wandering around the emotional landscape) to religious interpretations (the temptation of the devil?) to emotion atlases and other views.
However, when compared to all the things I've read and done, this book is transformative, in the sense that several situations shown in it are extremely relatable - where I would either be the victim or the perpetrator of anger - and it has several good techniques to deal with it - by reading it I think I'm changing my daily life and I'm sure I'll re-read it from time to time to relearn.
Highly recommended!