FBI Special Agent Pendergast and Constance Greene take a final stand against the deadliest serial killer in the history of New York: Pendergast's own ancestor, Dr. Enoch Leng. The latest thrilling timeslip adventure in the New York Times-bestselling series from Preston and Child.

A desperate bargain is broken... but a vengeful angel will not be deterred.

Having travelled back in time, Constance Greene confronts Manhattan's most dangerous serial killer, Dr. Enoch Leng – but she is betrayed and turned away empty-handed, incandescent with rage.

As Agent Pendergast focuses on assisting Constance in her fanatical quest for vengeance, his brother Diogenes unexpectedly,offers to help. Disguised as a cleric, Diogenes establishes himself in Victorian-era New York's notorious Five Points slum, watching Leng's every move... and awaiting his own chance to strike.

But Constance strikes out on her own, to rescue her beloved siblings from a tragic fate and take savage retribution on Leng. Can she and Pendergast outwit the wily killer... or will he emerge triumphant once more?

'Preston and Child know how to craft compelling stories that are both baffling and surprising.' Associated Press