An Internal Affairs officer is dead of an apparent suicide, but detective Sam Kovac is sure the death is a result of foul play.

With the help of local law enforcement and the FBI, the Monkeewrench crew tracks a serial killer using savvy computer technology.

As the dreary, bitter weather of late fall descends on Minneapolis, Detective Nikki Liska is restless. After moving to the cold case squad in order to spend more time with her sons, she misses the rush of pulling an all-nighter, the sense of urgency of hunting a murderer on the loose. Most of all she misses her old partner, Sam Kovac. Sam is having an even harder time adjusting to Nikki's absence, saddled with a green new partner younger than pieces...

When a series of grisly murders occurs shortly after a Monkeewrench Software partner thwarts an assassination attempt on a retired FBI agent, Minneapolis homicide detectives Leo Magozzi and Gino Rolseth team up to link the crimes.

It's a bitter winter in Minnesota--too cold to kill. There hasn't been a murder for a month, but the lull quickly comes to an end for Detectives Leo Magozzi and Gino Rolseth, when they're called to the gruesome homicide of Kelly Ramage. Found in a friend's vacant house, this was no random attack, and clues reveal that she was living a very dangerous secret life. Magozzi and Gino trace her steps back to an art gallery where she was last seen alive....

"The Monkeewrench crew returns to face the city of Minneapolis's worst nightmare--a rampant serial killer on the loose--in the electrifying new thriller. When Minneapolis homicide detectives Leo Magozzi and Gino Rolseth are called to a crime scene in a heavily wooded city park, everything about the setting is all too familiar. And when they discover a playing card on the victim's body, their worst fears are confirmed--there's a serial killer operating...