What makes a violinist become a policeman, or a monk fall in love? How does someone lose 18 stone in as many months? Or a follower of radical Islam turn his back on holy war? When can simply taking a new name usher in a new life? And how does a family adapt to the brain injury that changes their child beyond recognition? These andother stories combine with a wealth of smart thinking from psychology, philosophy, literature and science as Polly Morland unravels the mysteries and mechanisms of human change. The author is an award-winning writer and documentary-maker. This is her third book.