MICHAEL MATTHEWS' #1 BESTSELLING AUTHOR OF BODY BUILDING WORKOUT BOOKS.The Little Black Book of Workoiut Motivation is his latest book written so you can master the psychological "Playbook" top performers use to shift their negative thinking and behaviors into peak performance and lasting success..... inside and outside the gym. It contains practical scientific research, compelling stories, and time-proven tactics that will help you discover and tap into the inner strength you need to take control of your body and life.