Angels, demons, and demigods are ubiquitous in popular culture, functioning as protagonists, antagonists, and amused commentators on the folly (or glory) of human existence. Why do these celestial beings hold such enduring power in the human imagination? How do we conceive of angels and what do they mean to us? What are common characteristics of demons and devils, and how do they interplay with human beings? What are demigods, and how do...