<b>Murder is his art. Catching killers is hers.</b><br><br>In Gotham City, heinous acts of violence are a daily occurrence. Harley Quinn, forensic psychiatrist and profiler, consults with the GCPD on<br>their worst cases. But she is fixated on an unsolved murder that haunts her—the night she discovered her roommate’s body marked with the<br>signature of a notorious serial killer known as The Joker.<br> <br>Five years later, the case remains unsolved, and a new series of horrific killings has begun. As the murders escalate and the meticulously<br>constructed crime scenes become more elaborate, Harley’s obsession with finding the depraved psychopath responsible leads her down a<br>dangerous path. When the past and the present finally collide, Harley has to decide how far she is willing to go—and how many lines she is<br>willing to cross—to solve these cases once and for all.<br> <br>Written by #1 <i>New York Times</i> and international bestselling