Are you talking about how to deal with people who are angry with or around you? How to deal with your own anger? How to help a child deal with their anger?
If it's for yourself, I'm gonna suggest that you go take a class. Around here they have free ones through the county. If it's for somebody else, take it with them. I got way more out of that class than I have any of the books that I have read. I have also been able to teach my kids those skills as well.
Being able to talk to other people about it all is amazingly liberating and it was a wake up call for me being with some people who were court order to be there. Think of it as taking a parenting class before your kids are to the point of being "the bad kid". I took that class and realized I didn't want to be them, and that's who I could be if I didn't do something now.
Good luck!