Book excerpt: Genius on the Edge introduces the public to the man who revolutionized modern surgery at the same time it weaves a compelling biography with a fascinating tour of American medicine at the turn of the 19th century. Coming of age in the wake of the Civil War, William Stewart Halsted became a doctor in an era when surgery was a dangerous game of chance. By the time of his death in 1922, Halsted had transformed surgery and had pioneered techniques and procedures that are routine in today's operating rooms. But this came at a high price-drug addiction and alienation from his friends and family. His enormous professional accomplishments, eccentric personal behavior, and lifetime of drug addiction defy conventional wisdom. In the first comprehensive portrait of this complex and indisputably brilliant man, author Gerald Imber-a renowned plastic surgeon himself-takes readers to the upper echelons of society in New York City and Baltimore, blending tales of Gilded Age decadence with captivating accounts from the front lines of medical discovery. Combining the historical atmosphere of The Alienist with an unconventional hero, Genius on the Edge celebrates one of history's most daring doctors. Book jacket.