Shortlisted for the 2020 Royal Society Insight Investment Science Book PrizeNamed a Best Book of 2020 by The Guardian * The Telegraph"One of America's most courageous young journalists" and the author of the #1 New York Times bestselling memoir Brain on Fire investigates the shocking mystery behind the dramatic experiment that revolutionized modern medicine (NPR).Doctors have struggled for centuries to define insanity--how do you diagnose it, how do you treat it, how do you e