Goodreads helps you keep track of books you want to read.
Start by marking “Murder Theory (The Naturalist, #3)” as Want to Read:
Murder Theory (The Naturalist, #3)
Enlarge cover
Rate this book
Clear rating
Open Preview

Murder Theory

(The Naturalist #3)

4.25  ·  Rating details ·  4,814 ratings  ·  322 reviews
The desire to kill is becoming contagious in this riveting novel of conceivable mad science by the Wall Street Journal bestselling author of The Naturalist.

Computational biologist and serial-killer hunter Dr. Theo Cray receives an off-the-record request from the FBI to investigate an inexplicable double homicide. It happened at the excavation site where a murderer had
Kindle Edition, 296 pages
Published February 5th 2019 by Thomas & Mercer
More Details... Edit Details

Friend Reviews

To see what your friends thought of this book, please sign up.

Reader Q&A

To ask other readers questions about Murder Theory, please sign up.
Popular Answered Questions
Shawn K Duffy I would like Theo to marry his girlfriend, change his name and teach at a community college and VERY reluctantly be pulled into another investigation.…moreI would like Theo to marry his girlfriend, change his name and teach at a community college and VERY reluctantly be pulled into another investigation. But that is just me I guess.

Community Reviews

Showing 1-30
Average rating 4.25  · 
Rating details
 ·  4,814 ratings  ·  322 reviews

More filters
Sort order
Start your review of Murder Theory (The Naturalist, #3)
Feb 24, 2019 rated it really liked it
Shelves: netgalley
Intelligent, Dark, and Suspenseful!

Murder Theory is a tightly wound thriller with an intriguing lead.

Dr. Theo Cray, a computational biologist, uses science and the darkness he carries within, to catch serial killers. I cant say much about the plot of Murder Theory without giving spoilers, but I can say without giving anything away that Theo is the only person smart enough to identify and track down the killer. He breaks laws, pisses off the higher-ups, and puts himself in danger all in the
Chelsea Humphrey
Feb 17, 2019 rated it it was amazing  ·  review of another edition
Shelves: kindle-deals

Holy cliffhanger.

Feb 16, 2019 rated it really liked it
Shelves: netgalley

Dr. Theo Cray is a very different protagonist than I typically see in murder mysteries. Hes a computational biologist and in the prior two books, hes used his scientific methods to track down serial killers. As someone working with him says Youre like a time traveler trying to explain forensics to a bunch of medieval monks who still think in terms of humors and vital essences.

Also, the premise of this book is very different than the normal murder mystery. Something at the burial site for the
May 11, 2019 rated it really liked it
Shelves: net-galley
A virus that turns normal everyday Joe's into a murderer? Sign me up! I loved this book!
Dr. Theo Cray is not a cop, detective, or F.B.I. He's a sometime teacher, who also works in a lab. He's good with numbers and computational stuff that boggles my mind. He occasionally finds murderers that others can't find, or sometimes don't even know are active. But, Theo sees patterns that others can't see. It makes for one heck of a ride! I also enjoy that he's always spouting facts. It's all very
"I am not a Minion of Evil. I am Upper Management." (Unknown)

Andrew Mayne has sliced open quite the watermelon here. Thickly separated into juicy portions with a trail of sticky seeds.

Dr. Theo Cray wears his newly found reputation of serial-killer killer like an impressive tattoo. It ventures into a dark universe well beyond his usual territory of computational biologist. Mayne introduced us to Theo in The Naturalist which is the first book in this series. I had Looking Glass #2 up at bat, but
In Murder Theory, Computational biologist and serial-killer hunter Dr. Theo Cray is back after slaying dragons and killing monsters in the previous two novels. Well, okay, no dragons and the monsters were serial killers. Now there is something strange lurking in the dig around the last murder site, something that is making seemingly normal people kill and kill violently. While the local cops and even the FBI are quick to write this off as a one time psychotic break, Cray begins to see a pattern ...more
Feb 18, 2019 rated it really liked it
Shelves: thriller, crime
3.5 stars. I enjoyed this book but it wasnt as good as the first two in the series. It wasnt as funny and it was (more) science laden. Theo does go above and beyond to solve the crime particularly at Butchers Creek. ...more
Magdalena aka A Bookaholic Swede
Jan 20, 2019 rated it really liked it
Shelves: read-2019
I've read all the books published in the Jessica Blackwood series by Andrew Mayne. But, Murder Theory is the first I've read in The Naturalist series. And, I have to admit that at first didn't Dr. Theo Cray, a computational biologist and serial-killer hunter, rock my boat the same way that Jessica Blackwood does. Not a bad story at all, just not on the same interested level and it got a bit "scientific" now and then. Then, BAM one of the best scenes ever happened that pretty much changed how I ...more
Mogsy (MMOGC)
4.5 of 5 stars at The BiblioSanctum

The crime mystery and thriller genres are full of protagonists who claim they will go to any lengths to stop a killer, but computation biologist Dr. Theo Cray will give them all a run for their money in this totally insane and off-the-wall third volume of Andrew Maynes Naturalist series. Once more our hero is on the trail of a serial killer, but this time, he may have met his match. You might even say that Theo is
Lynn (Smile24k)
Feb 19, 2019 rated it liked it
Solid story, but missing the creepy factor I loved from the other books. This is the 3rd book in The Naturalist series and while it is still enjoyable, it is my least favorite.

Basic Plot: Dr. Theo Cray finds himself embroiled in another case of trying to find a serial killer. He is just coming off finding the Toy Man and now something bad has happened at the site of the Toy Man's killing ground. A couple people are dead and a forensic tech is a suspect. The tech would normally be the least
Sep 05, 2019 rated it liked it
This was another great read, but the Butcher Creek scenario was too extreme and unrealistic. The addition of secondary characters in the form of two young female gamers felt contrived. I did like Gallard and hope he continues. He reminds me of Glenn, who unfortunately died in the first book. He understands Theo and counterbalances Theos personality.

Now I must wait a few weeks for the next book. Looking forward to it.
Sep 01, 2019 rated it liked it
3.5 stars. I think the author lost his own plot a bit with this one. It was still very readable but didn't reach the heights of the first two.
Feb 19, 2019 rated it it was amazing
While this suspenseful mystery was a little heavy on the biology verbiage at times, I loved the plot, the suspense, and the ending leaving me wanting more - talk about a cliffhanger!! Theo Cray is a biologist computer expert who tracks serial killers. He is diabolical in his hunt which made the story even better. Good read for suspense/mystery fans - embrace the bio jargon and you'll be fine!

Thank you to NetGalley for advanced copy.
Feb 02, 2019 rated it it was amazing
I got this as a e book from Net Galley. I enjoyed reading this book. It had a good story to it. It is my first book read by this author.I hope to read more books by this author.
Another phenomenal addition to this series!!!! Keep them coming and I'll keep reading. I can't get enough Theo Cray.
Feb 14, 2019 rated it really liked it
Teetering between 4 & 5 stars. I really like these books & I like the main character but I feel like I should like him more & just dont. Also had to deduct some points for feasibility. Im good at suspending disbelief but this pushed me to the limit a few times. So that sounds a bit too negative but overall I really enjoyed this book! ...more
Feb 10, 2019 rated it liked it
I loved the first two books in this series, but I got annoyed pretty quickly with Theo in this one. I felt like he put himself out there too much and went too far. His logic for not involving the police/FBI just didn't seem to hold water like it did in the previous two books. About 3/4 of the way through I just wanted it to be over. I was entertained, but not to the level of the last two books.
Feb 13, 2019 rated it really liked it
I am really enjoying this series. The only weakness, which is kind of aggravating, is that Cray makes connections seemingly out of nowhere. He goes into his "fugue state" when he is following a train of thought, and then suddenly he knows where to look for the...thing, but we don't know how he got there. It's a minor complaint, but I hope Mayne is more fastidious in the next installment.
Feb 08, 2019 rated it really liked it
3.5-4 stars

Now what?!?! That ending! Ha! Im honestly surprised by how much Ive enjoyed this series. Theo Cray, for lack of a better word, is crazy. His no holds barred mentality gets him into trouble and while everything about these books feels incredibly far fetched, I am so entertained by them! I like the authors writing style and fast paced chapters, I love the quirky, nerdy characters, and the mystery behind all of it.
Feb 22, 2019 rated it really liked it  ·  review of another edition
Shelves: 2019-read
Review later
It pains me to give this 3 stars, but it just wasn't on the same level as the first two books in this series. It didn't grab me and suck me in. I missed the creepiness. I think this book was more of a filler book, and a turning point for Theo. Which makes me believe (and hope) the next book will get back on track and be phenomenal.

All that being said, the concept of this book really is quite terrifying. And the way Andrew Mayne writes makes it all so believable. I won't pretend to know what is
Feb 17, 2019 rated it really liked it
I received this book for free from the Publisher in exchange for an honest review. This does not affect my opinion of the book or the content of my review.The nitty-gritty: Mayne continues his series about computational scientist/serial murder catcher Dr. Theo Cray, with another stellar entry that will terrify readers with its what if? premise.

Well, Andrew Mayne has done it again. Damn these stories are so much fun! I decided on a whim to pick up Murder Theory over the weekend and raced
Lynn Williams
Feb 04, 2019 rated it it was amazing
4.5 of 5 stars
Murder Theory is the third instalment in Andrew Maines Naturalist series and is yet again a compelling and completely engrossing read. I think this could be read as a stand-alone although personally I would advise readers to check out the first two books in the series as theyre both great reads and on top of that it will give a better understanding of the main character, Theo Cray.

This books picks up just a short time after the conclusion of
First Sentence: The helpless man in the wheelchair thrilled him.

Dr. Theo Cray is a computational biologist. He has also built a reputation with the FBI as a hunter of serial killers and has been called upon to fulfill that role again. At the site of Cray's previous case, an agent with no history of violence has murdered two of his colleagues. Once captured, others note that he's not the same as he was, and the change is beyond his commission of the acts. But this isn't the only incident of
Jul 05, 2019 rated it liked it
Shelves: arc-netgalley
I received this ARC from Netgalley in exchanged for an honest review.

I love this series a lot! The first book was a solid 5 star for me and I was so happy to see a nerdy characters solving murders using logic and software. I honestly had so much fun reading it and found his oblivious but brilliant character so charming! Unfortunately for me, Murder Theory was a bit of a letdown. While I got to read only the eARC and not really the finished version, I doubt that any small changes to the text
Balaji Alagu
Mar 20, 2019 rated it it was amazing
Very thrilling book thats written well to capture your attention. Being a big fan of biological technologies myself, it quenches my curiosity of what could happen if the ethics behind biological research was not strong.

There has been so many moments within the book where I felt, what a genius this author is, for the twists he has provided.

Jan 21, 2019 rated it it was amazing
Shelves: first-reads
Another great installment in The Naturalist series. Now that we've gotten the exposition out of the way, we can really get to the meat of Dr. Theo Cray's newest case. And, when I say "meat" I shudder. Theo has always been dangerously close to the dark side. He uses his powers for good but he crosses barriers that take him to very dark places. This time, there may be an "evil" Theo at work and, being as smart as he is... this is very scary. This book could be read as a stand-alone novel, even if ...more
Jan 25, 2019 rated it it was amazing
I love this series and this latest entry makes me even love it more.

Dr. Theo Cray has a unique way of looking at serial killers and he puts his skills to the test as he searches for an ingenious monster whose modus operandi will send chills down your spine. Dr. Cray is a good guy but he doesn't suffer fools gladly and is not above bending or even breaking a few rules if he thinks the situation warrants it. Especially when the powers that be scoff at his findings. Do not let the scientific
Brandie Lea Slicer
Feb 08, 2019 rated it it was amazing
Best yet!

This has been my favorite Theo book so far and of course I cant wait for the next! The science I cant wrap my brain around, the Great characters and the unbelievable mysteries are epic! Looking forward to more!
Apr 06, 2019 rated it really liked it
So far this is my least favorite of the series. Granted the story is still very good and I really like the character we have read about 3 times now.

My problem with this book is that is seems to keep trying to up the stakes every book. In this book, the main character makes some very rough and dramatic decisions that go beyond what I feel like this character would do. And because of those decisions he really doesn't face any serious repercussions from his actions. He almost seems rewards by
« previous 1 3 4 5 6 7 8 9 10 11 next »
There are no discussion topics on this book yet. Be the first to start one »

Readers also enjoyed

  • Blood Echo (Burning Girl, #2)
  • The Body Keeper (Detective Jude Fontaine Mysteries #3)
  • A Cold Trail (Tracy Crosswhite, #7)
  • Bitter Falls (Stillhouse Lake #4)
  • In the Darkness (Zoe Bentley Mystery, #2)
  • The Eighth Sister (Charles Jenkins #1)
  • The Vanishing Season (The Collector, #4)
  • Ambush (Sydney Rose Parnell, #3)
  • Wolfhunter River (Stillhouse Lake, #3)
  • Winter World (The Long Winter, #1)
  • The Crooked Street (Frost Easton, #3)
  • Bad Memory (Jessica Shaw, #2)
  • Red Rain (Nameless #4)
  • All the Devils (Livia Lone #4)
  • The Killer Collective (John Rain, #10; Ben Treven #4; Livia Lone #3)
  • The Praying Mantis Bride (Nameless #3)
  • The Mercy of Snakes (Nameless #5)
  • Photographing the Dead (Nameless #2)
See similar books…

Other books in the series

The Naturalist (4 books)
  • The Naturalist (The Naturalist, #1)
  • Looking Glass  (The Naturalist, #2)
  • Dark Pattern (The Naturalist, #4)

Related Articles

April is the most hopeful of months, promising warm days and sunshine just around the corner. The weather is a little unpredictable, sure, but tha...
85 likes · 23 comments
“When Europeans came to the Americas and witnessed Aztec sacrificial rituals, they were coming from a continent with practices that in many ways were equally barbaric, but because they understood the justifications of their own practices, they viewed them differently.” 0 likes
“it’ll come down to more shoe leather on my part,” 0 likes
More quotes…