Detective Helen Grace faces her own dark compulsions in the twisty new thriller from the author of Pop Goes the Weasel and Eeny Meeny. In the darkest corners of the city, there is a thriving nightlife where people can let loose and cross the lines of work and play, of pleasure and pain. But now that sanctuary has been breached. A killer has struck and a man is dead.   In a world where disguises and discretion are the norm, one admission could unravel a life. No one wants to come forward to say what they saw or what they know—including the woman heading the investigation: Detective Helen Grace.   Helen knew the victim. And the victim knew her—better than anyone else. And when the murderer strikes again, Helen must decide how many more lines she’s willing to cross to bring in a devious and elusive serial killer...