Since its inception in the early twentieth century, brain surgery has maintained an air of mystery. Warm, rigorous and deeply insightful, neurosurgeon Theodore Schwartz reveals what it’s really like to get inside someone’s head – where every second can mean the difference between life or death. Drawing from Schwartz’s experience in one of New York’s busiest hospitals, Gray Matters explores the short but storied history of brain surgery. From the dark days of the lobotomy to the latest research into the long-term effects of contact sports on athletes’ cerebral health, Schwartz unfolds the fascinating story of how we came to understand this extraordinary, three-pound organ, which not only keeps us alive, but makes us who we are.