Award-winning science writer Helen Thomson unlocks the biggest mysteries of the human brain through nine extraordinary cases. Our brains are far stranger than we think. We take it for granted that we can remember, feel emotion, navigate, empathize, and understand the world around us, but how would our lives change if these abilities were dramatically enhanced - or disappeared overnight? From the man who thinks he's a tiger to the doctor who feels the pain of others just by looking at them to a woman who hears music that's not there these people have had experiences that illustrate how the brain can shape our lives in unexpected and, in some cases, brilliant and alarming ways.