FBI Special Agent A. X. L. Pendergast always wants to protect his protegee Constance Greene from harm. But, against all odds, Constance has found a way to travel back in time. Heading to New York City in the late 1800s, Constance returns to the century of her birth to embark on a dangerous quest: stopping the era's most infamous serial killer, Dr. Enoch Leng, from bringing his nefarious plans to fruition. The new "Agent Pendergast" thriller from New York Times bestsellers Preston & Child.