Detailed biography of the aging author’s mental decline by a forensic psychiatrist. Farah draws on letters, family history, memoirs, biographies, and FBI files to conclude that multiple factors led to Hemingway’s permanent dementia, including genetic influences, alcohol abuse, and the cumulative effect of traumatic brain injuries. Comments on the numerous head traumas Hemingway sustained from his World War I wounding to the African plane crashes and discusses his writings, particularly A Moveable Feast, considering his progressive illness. Concludes by summing up the various treatment options available to Hemingway at the time and today had his condition been properly diagnosed. Includes notes, critical bibliography, and index.