I've had a latent anger problem for years and have tried other books, most notably 'Beyond Anger: A Guide For Men'. Where I think that book failed (for me) and 'Overcoming Anger and Irritability' succeeds, is in its thoroughly systematic approach. The first half of the book methodically breaks down anger into a series of stages, beginning with a trigger event. Following that comes an appraisal of the trigger, which, depending on the appraisee, can lead to anger. There are other factors affecting the appraisal: inhibitions, beliefs and mood.
I personally found this approach very helpful in developing a strategy for coping with, managing and even preventing my anger erupting in the first place. The book is full of exercises that anyone can do, such as keeping a diary. I strongly recommend that you follow the exercises and be as methodical as you can in your battle with your anger. Honestly, if this book can help me with my considerable anger, it should benefit many people.