Since he first fought Batman in 1940, The Joker has evolved into one of pop culture's most complex, chaotic, and confounding psychological creations. In The Joker Psychology, Dr. Travis Langley, author of the bestselling Batman and Psychology, explores the twisted psyche of this great supervillain, as well as the personalities who are inexorably drawn to it. Through 15 chapters, including special interviews with the people who have brought the Joker and Harley to life in comics and onscreen, this collection analyzes: Why a bright, laughing monster who looks like a clown could be the ultimate antagonist to a grim, brooding hero who looks like a monster. The relationship between a therapist and her patient--and what happens when a therapist crosses the line, as Harley Quinn does when she falls for The Joker. How a smart person could fall for the most dangerous of criminals. Why so many fans find Harley Quinn inspirational. How different kinds of therapy could (or could not) help twisted minds like Mister J and Harley Quinn. The development of a fictional character that so completely embodies psychopathy (including interviews with creators who have shaped The Joker's character over the years).