""The Knight in Disguise and the Amazing Genius of O. Henry"" is a book written by Vachel Lindsay. This book is a biography of the famous American writer O. Henry, who is known for his short stories that are full of wit, humor, and surprise endings. The book explores the life and work of O. Henry, from his early days as a struggling writer to his rise to fame and success. It also delves into the influences that shaped his writing style, including...