"On Monsters: An Unnatural History of Our Worst Fears" by Stephen T. Asma is a trade paperback book published by Oxford University Press in 2011. The book explores psychology, folklore, mythology, metaphysics, and social psychology topics related to unexplained phenomena. It is illustrated, measures 9.1 inches in length, 6.1 inches in width, and 1 inch in height, with 351 pages and written in English.