The Fourth Monkey


The Fourth Monkey by J. D. Barker

Publisher: Houghton Mifflin Harcourt

Published: June 27, 2017

Rating: 4/5/5

Summary (off Goodreads): For over five years, the Four Monkey Killer has terrorized the residents of Chicago. When his body is found, the police quickly realize he was on his way to deliver one final message, one which proves he has taken another victim who may still be alive. 

As the lead investigator on the 4MK task force, Detective Sam Porter knows even in death, the killer is far from finished. When he discovers a personal diary in the jacket pocket of the body, Porter finds himself caught up in the mind of a psychopath, unraveling a twisted history in hopes of finding one last girl, all while struggling with personal demons of his own.

With only a handful of clues, the elusive killer’s identity remains a mystery. Time is running out and the Four Monkey Killer taunts from beyond the grave in this masterfully written fast-paced thriller.

Thank you to HMH for sending me a copy to review!

I finished this book and I could not put it down when I was reading! I hated that I couldn’t read it through because I had work and other obligations taking over. I really love reading crime novels and thriller novels and this book was definitely worth all the praise it’s been getting!

It starts out following Sam Porter, who is a detective on this case following the Four Monkey Killer.

The 4MK guy takes his name after the Do No Evil monkey which follows the three monkeys saying Speak No Evil, See No Evil, and Hear No Evil. And he really takes the Do No Evil and uses that to find his victims. He leaves pieces of body parts, then the body for police to find. He also leaves his journal for Sam Porter to read and it goes into the mind of the killer and shows a lot of his background which I will get into in a bit!

I really thought this killer was so unique, interesting, complex, and so much more! He was very twisted and while you read about his murders, you see his method and how he selects his victims-basically people he thought were bad, but he didn’t punish them the typical way which was super interesting to read about! Plus his journal is so intense, and wow! It really showed a different side of the killer, but also was so strange and twisted! He’s very creepy, especially as a child with the kid of parents like his….his parents were so weird. But reading about his parents really makes me understand how he turned out like he did.

But I loved Sam Porter! Him and Nash were my favorite characters in the story! I liked that they had a good friendship, which I wish we could have really seen more of in this book but I do love those characters very much!

Also Clair was so funny and I enjoyed reading her POV.

So the plot was so intense and I was on the edge of my seat during most of it trying to figure out the mystery and was taken along on this insane journey! Like wow! So many twists and turns and my jaw dropped so many times because you would think one thing about the killer and what was going on, and then suddenly things change and what you thought you knew isn’t true anymore! It happened quite a few times and so many things were revealed and I was just so shocked! Also reading about the killer’s past was shocking too, not just with the crime they were trying to solve.

I could not even predict how this book would end and I was so shocked at how it did end! Like wow I was not expecting that! I hope there’s more books coming up because I really want to read them because that ending!


Overall this was such a great book! I loved the plot, the suspense, the characters, and just the book overall! Highly recommend for those who love to read thriller/crime novels! This book is definitely something you should check out!



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