Book 1

The Fourth Monkey

by J.D. Barker

Published 27 June 2017

`The Fourth Monkey has one of the most ingenious openings that I’ve read in years. This thriller never disappoints.’
James Patterson

`Superbly constructed and immaculately paced’ – The Daily Mail

Brilliant. Complicated. Psychopath.

That’s the Four Monkey Killer or `4MK’. A murderer with a twisted vision and absolutely no mercy.

Detective Sam Porter has hunted him for five long years, the recipient of box after box of grisly trinkets carved from the bodies of 4MK’s victims.

But now Porter has learnt the killer’s twisted history and is racing to do the seemingly impossible – find 4MK’s latest victim before it’s too late…


Book 2

The Fifth to Die

by J.D. Barker

Published 10 July 2018
"In the thrilling sequel to The Fourth Monkey, a new serial killer stalks the streets of Chicago, while Detective Porter delves deeper into the dark past of the Four Monkey Killer. Detective Porter and the team have been pulled from the hunt for Anson Bishop, the Four Monkey Killer, by the feds. When the body of a young girl is found beneath the frozen waters of Jackson Park Lagoon, she is quickly identified as Ella Reynolds, missing three weeks. But how did she get there? The lagoon froze months earlier. More baffling? She's found wearing the clothes of another girl, missing less than two days. While the detectives of Chicago Metro try to make sense of the quickly developing case, Porter secretly continues his pursuit of 4MK, knowing the best way to find Bishop is to track down his mother. When the captain finds out about Porter's activities, he's suspended, leaving his partners Clair and Nash to continue the search for the new killer alone. Obsessed with catching Bishop, Porter follows a single grainy photograph from Chicago to the streets of New Orleans and stumbles into a world darker than he could have possibly imagined, where he quickly realizes that the only place more frightening than the mind of a serial killer is the mind of the mother from which he came."--

Book 3

The Sixth Wicked Child

by J.D. Barker

Published 27 August 2019

In the riveting conclusion of the 4MK trilogy, Barker takes the thriller to an entirely new level. Don't miss a single word of the series James Patterson called "ingenious."

Hear No Evil

For Detective Sam Porter, the words “Father, forgive me” conjure memories long forgotten; a past intentionally buried. For Anson Bishop, these three words connect a childhood to the present as he unleashes a truth concealed for decades.

See No Evil

Found written on cardboard near each body, these words link multiple victims to a single killer—discovered within minutes of each other in both Chicago and South Carolina—clearly connected yet separated by impossible miles.

Speak No Evil

Chicago Metro and the FBI find themselves caught in chaos—a hospital on lockdown, a rogue officer, and corruption at the highest levels. When Anson Bishop, the prime suspect in the notorious 4MK serial murders turns himself in, he reveals a story completely unexpected, one that not only upends the current investigation, but one that will change the lives of all involved.

Do No Evil

With unrelenting tension and pulse-pounding suspense, the past unravels at breakneck speed as the truth behind the Four Monkey Killer’s motive is finally revealed in this masterfully crafted finale.