I think the most helpful section for teens might be giving them words to describe their anger. I like how the book presents anger as a choice and encourages teens to make a choice not to be angry. I think applicable part for an adult or more mature would be that anger can mask other feelings. I pray we all can be more in touch with our feelings and have healthy responses. Con to the book might be encouraging teens to talk to their friends about making them upset. While I think is good, if the teen is dealing with a lot of anger, it could get excessive listing every perceived slight and fault of a friend. I like how short the book was: I might add a little section on maturity: sometimes one individual might be mature enough to take responsibility for actions and emotions but the other end might not be as mature. Again though, I think the message is good that YOU control YOU. So the teen is encouraged to deal with emotions regardless of how others respond.