Detective Comics (1937-) #831

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.

Written By:
Paul Dini
Pencils:
Don Kramer
Inks:
Wayne Faucher
Cover By:
Guy Major, Simone Bianchi