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When Harley ruins the Riddler's carefully constructed scheme to capture Batman, she's determined to show the calculating crook that she's no bad-luck jinx. She'll use her brilliantly bonkers mind to write confounding rhymes of her own! In this battle of wits, can the jolly jester prove there's a method to her madness? Find out in this action-packed chapter book for DC Super Hero and Super-Villain fans!