During the DC/DC Black Label panel at BookCon today in New York, DC announced a new comic book series from their DC Black Label imprint, Joker/Harley: Criminal Sanity, written by #1 New York Times and internationally bestselling author Kami Garcia and artists Mike Mayhew and Mico Suayan.

The nine-issue psychological thriller follows Harley Quinn, the young and brilliant forensic psychiatrist and profiler consulting for the Gotham City Police Department (GCPD), as she pursues a vicious killer terrorizing the city. She has no idea the investigation will bring her face-to-face with the most notorious serial killer in Gotham’s history—the Joker. The series will debut October 2, 2019.

In Gotham City, where heinous acts of violence are a daily occurrence, the GCPD relies on Harley Quinn, a young forensic psychiatrist and profiler, to consult on their toughest cases. But Harley is haunted by one case in particular—when she found herself at the center of a horrifying crime scene the night she discovered the body of her roommate, left with the signature of a notorious serial killer—the Joker.

When a series of gruesome displays of murder appear throughout the city, the past and present collide as Harley’s obsession with finding the depraved psychopath responsible leads her down a dangerous path. She must decide how far she is willing to go, and what lines she is willing to cross to solve these cases once and for all.

DC Black Label features out-of-continuity stories by some of the most revered voices in the comics and literary world.