Phobias and manias are deeply personal experiences, and among the most common anxiety disorders of our time, but they are also clues to our shared past. The award-winning author Kate Summerscale uses rich and riveting case studies to trace the origins of our obsessions, unearthing a history of human strangeness, from the middle ages to the present day, and a wealth of explanations for some of our most powerful aversions and desires.