Hello crime fiction aficionados,
Do you ever find yourself riding a train or walking to work or waking up in a cold sweat in the middle of the night wondering, what makes a mystery a mystery? How does horror writing intersect with mystery fiction? Is suspense a subgenre or an element of craft? Is it both? In what ways can mystery writers stretch the genre without breaking the rules readers need? What, now that I’m thinking of this, are the conventions that must be followed?
If so – join me. If not – proceed with caution.
What makes a mystery a mystery?
A lot of other people who are pretty brilliant have written extensively about this. (For more, check out this MWA guide or this CrimeReads article about mystery tropes). A quick google yields all sorts of the collective wisdom about tropes and subgenres and conventions. Otto Penzler defines a mystery as “any work of fiction where a crime or threat of crime is central to the plot or theme.” (For more, you can read his CrimeReads article on subgenres in mystery fiction.)
I’ve heard others espouse to a more purist view, saying that “mystery” without any qualifiers can be interpreted to mean “traditional mystery” (think “Golden Age of Detective Fiction”) which entails a murder (or crime), a detective or investigator, clues, and a villain. Some form of justice is meted out at the end and the dead body is more a necessary detail than a fully developed character. The author of a traditional mystery follows the fair game rules and includes other tools of the genre like MacGuffins and red herrings.
I’m curious – what does mystery mean to you? When you think about your own internal barometer, where do you draw the line? Why?
On Tropes
Foundational to any genre are the often loved, often hated tropes. Tropes are common themes or ideas that recur. In the hands of some, they are clichés. All genre fiction leverages tropes to build the guardrails of the story structure and help readers see the rules of the game. Mystery readers are unique in that we love our rules and we also enjoy a well-done twist.
In mysteries tropes may include but are not limited to: locked rooms in which something bad happens, red herrings, unreliable narrators, MacGuffins, amateur sleuths, femme fatales, a sidekick (think Holmes and Watson, Hastings and Poirot, Rizzoli and Isles, Nero and Archie), morally grey detectives, and the list goes on.
I myself am a fan of classic tropes reimagined, especially noir and hard-boiled tropes that explore gender, identity, and power.
In the hands of exceptional writers, a classic trope can be twisted into something else entirely.
I’m curious – what is your stance on tropes? What are your favorites? What do you avoid? Do you have an author who does something very, very well?
If you’re still with me, I invite you a little deeper into the workings of my brain.
You are welcome.
A Visual Representation of the Intersection of Subgenre and Sleuth
In order to explore some of these ideas, I’ve invested a little too much time in building an X-Y paradigm for some of my favorite characters in a series. I’ve taken common subgenres (running from Cozy to Noir with Traditional roughly in the middle) and run them up the Y axis. The sleuth runs from amateur to professional on the X axis.
(See the image I’ve very thoughtfully included. Again, you’re welcome.)

My Findings
I realized that, while some sleuths may start out as amateurs, the more dead bodies they encounter, the more skilled they become. At what point do we say that Miss Marple, who is featured in 12 novels and 20 short stories, is beyond an “amateur” sleuth? I considered adding arrows to indicate growth over time, but this became messy. And sometimes, there is no growth over time. Sometimes the amateur is static.
Secondly, I had definitive clusters of sleuths at different points. I went through a real crisis when trying to determine if police were to the right or left of private investigators. (I decided on right.)
Finally, my top left quadrant is very empty. I have theories about this. Authors like S.A. Cosby, Morgan Talty, Gabino Iglesias, Megan Abbot, and Silvia Moreno-Garcia have stand alone characters that belong in the upper left quadrant. And I wonder if there is something to be said for the upper left quadrant tiptoeing into other spaces? Maybe horror? Literary Fiction?
Perhaps in another entry, I’ll explore the intersection crime with different genres. Maybe a 3 part Venn diagram comparing Red Harvest to Yojimbo to A Fistful of Dollars? I love to see how arts iterates and ultimately reflects the society in which we live.
If you write, where do your characters live? Lower left? Upper right? Somewhere in between? Who did I miss? Where would you put them on this paradigm? What do you think I got wrong and why? Are there any other paradigms you think are worth exploring in crime writing?
Thanks for indulging me and hoping to connect again soon,
Gabi














I think that mystery is just fiction where something happens, often a murder or a crime, and the story is propelled forward. My characters live on the upper right.
Hi Matt- I’m wondering if you think the propulsion forward is suspense? So the equation would be mystery = thing happening + suspense? I’m having way too much fun turning this into something vaguely algebraic.
This a timely article for me. I am a novice crime mystery writer and I am trying to figure out how to do it. I just got the MWA Guide and finding it very useful in answering some of my questions. I am going to save this article and your diagram and will keep thinking about the questions your ask. I have two mystery series going on: one character is in the top right and the other is in the bottom left.
Good luck with the MWA guide! If you’re into unsolicited advice – I’d also recommend, if you haven’t heard of it, the Guppies chapter of Sisters in Crime. It a chapter that is specifically for mystery writers who are getting started and offers courses, manuscript swaps, and all sorts of resources. If you’re not, pretend I didn’t offer any up. Good luck and hope you comment again with updates on your manuscripts!
You’ve definitely got me thinking about this, Gabi. The Burgess books are definitely hardboiled/noir but with more character development than is sometimes allowed. Even the Thea Kozak mysteries, which are traditional amateur female PI, are darker than many traditionals. And then there are domestic thrillers, romantic suspense, and then all the places where the boundaries blur. Great post. Now I just need another four or five hours to parse it.
Kate
I definitely put you in the top right for the Burgess books. I’d put most domestic suspense/thriller in the top left quadrant, I think. I was wondering if you’d ever written anything on the bottom parts of the quadrant. Any short stories floating around with a cozier feel, Kate?
Whoa, food for thought, and thank you for including Nancy Drew and Lord Peter as close examples. Foundation characters that are often overlooked. My characters begin in the lower left and migrate north from there as they develop. Looking forward to the Venn.
I love love love those Golden Age anchors. I think the Hardy Boys are a young prototype for Jack Reacher. And Miss Marple is the foundation for those village-style cozies.
This is fascinating! As a cozy mystery fan and writer, I was surprised by the sheer number of entries in the cozy-amateur quadrant. Thought-provoking way to start the day out here on the Left Coast!
This is great! I think about this quite a bit as my female P.I. Olivia Lively is a professional private eye, but the tone reads more like a cozy. Not gritty, in other words. She’d fall somewhere in the bottom right. I think.
As for the top left, that’s something to think about. Some Nora Roberts romantic suspense is quite dark, regular people trying to solve a mysterious problem or more likely to be running from danger. I think you are right. If it gets too dark you are talking horror. Sookie Stackhouse vampire mysteries might go here?
What’s interesting here is you may have uncovered space/niche that isn’t over saturated—pretty rare these days.
I was wondering what we have in the bottom right. And I did struggle a little with where to put medical examiner types that find themselves embroiled in murder investigations. They are professions exactly. But they also sort of are. And I love the question about paranormal mysteries. Yes to Sookie Stahouse in the top left. And Alexia Gordon’s paranormal mysteries would go more bottom left, I think. So much fun to think about.