DETECTIVE COMICS #831
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Writer Paul Dini — creator of Harley Quinn — returns with art team Don Kramer and Wayne Faucher (JSA)! A bizarre incident forges a temporary alliance between the Dark Knight and his daffy-but-deadly adversary Harley Quinn. Forget everything you think you know about Dr. Harleen Quinzel as Batman uncovers long-buried secrets from his enemy's unknown past.