DC has announced a new one-shot, Joker/Harley: Criminal Sanity Secret Files #1, by Kami Garcia, Ed Kurz, M.D., David Mack, Jason Badower and more. What's more, the company has unveiled Mack's haunting cover art for the book set in the world of the popular Black Label title Joker/Harley: Criminal Sanity.

Garcia worked very closely with Dr. Kruz on Criminal Sanity, and that work will continue to pay off in the upcoming one-shot, which reveals "secrets from Harley’s past, hidden details of crime scenes, and a real-life profile of The Joker that has driven the progression of his murders in the story!"

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"We profiled Joker as if he were a real person," Garcia said. "I wanted to write a very accurate procedural. I wanted people to make sure their doors were locked after they read the issue. To really feel like he could be out there."

Joker/Harley: Criminal Sanity Secret Files #1, by Kami Garcia, Ed Kurz, M.D., David Mack, Jason Badower and more, goes on sale June 6. Priced at $5.99, the book will be published under DC's Black Laber and printed in Presitge Plus format.

KEEP READING: Joker/Harley Criminal Sanity #3 First Look Gets Violent