If you haven't seen it, it's worth reading. He's a pianist himself, and he details his whole career of looking at and observing incredibly powerful effects that music has had on peoples' lives in unusual situations.
Si vous l'avez pas encore lu, ça vaut le coup. Il est lui même pianiste, et il raconte sa carrière passée à regarder et observer le pouvoir incroyable que la musique a sur la vie des gens dans des situations inhabituelles.