In "Saints and Sinners on Horseback" Volume I, we meet saints, sinners, and their horses, mules, and donkeys on the road. Whether saint, sinner, or simply all too human, the medieval individual's connection to equids reflected relationships with other animals, the rest of humanity, and with the deity. Knowledge of horses permeated hagiographies and homilies, histories and biographies. Equids were recruited in commentaries on morality and Christian duty. In a world in which equids are not so readily encountered, "Saints and Sinners on Horseback" informs the modern reader about the essential part played by horses in medieval life, literature, and belief.