It was a relatively minor criminal matter, but enough that the U.S. Marshals obtained a warrant to enter the home. They didn't expect to unearth trophies from a score of killings. Now Lucas Davenport is on the trail of a serial murderer, one who was able to operate for years without notice or suspicion. But there's even more to this killer than meets the eye.

A code is broken that contains the names of six women linked to a remorseless serial killer cunning enough to leave no trace of his crimes.

NYPD Homicide Detective Nikki Heat, continuing to pursue the elusive former CIA station chief who ordered her execution over a decade ago, teams up with her lover to find the old spy, while a serial killer terrorizes the Twentieth Precinct, singling Nikki out as the recipient of his twisted messages.

When a series of attacks targeting Michael Bennett injures one of his children and causes several deaths, the New York police officer leads an investigation to unravel what the killer's plan is.

"A series of shootings exposes San Francisco to a methodical yet unpredictable killer, and a reluctant woman decides to put her trust in Sergeant Lindsay Boxer. The confidential informant's tip leads Lindsay to disturbing conclusions, including that something has gone horribly wrong inside the police department itself. The hunt for the killer lures Lindsay out of her jurisdiction, and gets inside Lindsay in dangerous ways. She suffers unsettling medical...