This book presents the definitive biography of businessman and philanthropist John Kernan Mullen. Mullen, who fled the Irish potato famine as a child, later ruthlessly rose to control of the West's flour milling industry and was one of the architects of early Denver's transformation from a dusty supply town to the Queen City of the Mountains and the Plains. This biography presents an intimate look at Mullen's personal ups and downs, his struggles with his own family, his public fight for ethnic and religious tolerance, and his secret support of one of Colorado's best-known figures, Baby Doe Tabor.