Where did Harley Quinn meet the Joker? What are the names of her pet hyenas? Who does the Clown Princess of Crime turn to when she needs a helping hand? Uncover a treasure trove of info about Gotham City's jolly jester. Featuring captivating text, quick lists, fun quizzes and more, this behind-the-scenes bio is bursting with fantastic facts and super secrets! It has everything young readers never knew they needed to know about Harley Quinn!