The Perfect Crime: The Seven Key Ingredients of a Successful Crime Novel

Want to write a crime novel that grips your readers from page one? These seven hallmarks of the genre will lead you straight to success—dead certain.

‘What’s one life more or less? Some people are better off dead—like your wife, or my father.’ It’s lines like this that once shocked readers of crime and thriller writer Patricia Highsmith. Her characters offer a glimpse into the darkest corners of the human psyche, consistently challenging conventional morality. Crime fiction, at its core, is a rupture with virtue. One instinctively wants to look away from the evil—but can’t resist the urge to peek.

Bruno, the character who utters this chilling line in Highsmith’s bestseller Strangers on a Train, is just one of her many terrifyingly brilliant creations. Unlike many traditional crime novels, hers are less concerned with the ‘whodunit’ and more with the ‘whydunit’: Why does someone commit a crime, and what allows them to act on the unspeakable impulses that lurk within us all? The psychological complexity of her writing made Patricia Highsmith a global bestseller.

But what exactly sets a good crime novel apart from a great one? And what qualities must it have to keep us reading until sunrise? The soul of crime fiction is dark and elusive—just like the motives of its characters. At novum publishing, we’ve analysed best-in-class examples of the genre to uncover the seven ingredients of truly gripping crime fiction.

The Seven Key Ingredients of Successful Crime Fiction

Unfathomable Characters

Patricia Highsmith remains the gold standard for character creation. Her villains—often bordering on the psychopathic—are as unpredictable as they are original. But it’s not just her antagonists that are richly drawn; her protagonists are often just as complex, frequently in conflict with themselves. A crime novel with bestseller potential will have intriguing leads on both sides of the moral spectrum. That’s why entire series have been built around unique detectives like the eccentric Hercule Poirot or the empathetic Commissario Guido Brunetti. For readers today, authors such as Tana French (In the Woods) and Denise Mina (The Long Drop) also create layered characters who defy black-and-white categorisation.

Obscured Motives

Among fans of crime fiction, Gillian Flynn (Gone Girl) commands cult status. She masterfully obscures her characters’ motives, laying false trails and shifting perspectives, forcing readers to stay alert until the very last page. To write a successful crime novel, the writer must blur the motives and tracks of their criminals, encouraging readers to investigate alongside the protagonist. This immerses the reader fully in the mystery.

Unpredictable Plot Twists

Agatha Christie was a master of the unexpected. Though her novels often follow a similar plot structure, each one delivers a unique, surprising twist. Just when readers are sure they’ve identified the culprit, everything changes. Crafting a masterful plot twist requires skill—whether it’s the sudden death of a major character or a revelation that turns the case upside down. For modern readers, authors like Sophie Hannah, who continues Christie’s Poirot series, or Alex Michaelides (The Silent Patient) offer equally shocking narrative turns.

Are you longing for plot twists that will surprise even you? In this article, we reveal how you can give your book an unexpected twist using the technique of discovery writing.

Authentic Investigative Work

To be taken seriously as a crime writer, it’s essential to understand real-world investigative procedures. What does a detective’s daily routine look like? How are crime scenes analysed? A great crime novel is marked by its authenticity. This attention to detail satisfies readers’ desire for an insider’s look into police work. Dexter Morgan, the forensic analyst in Jeff Lindsay’s Darkly Dreaming Dexter, is a prime example. Specialising in blood spatter analysis, Dexter’s work lends both credibility to the story and depth to his character. Precision is key—logical missteps are especially unforgivable in crime fiction.

Atmospheric Settings

Death on the Nile and Murder on the Orient Express whisk us away to remote, exotic locales. Agatha Christie chose her settings with care—because a crime that unfolds against an unusual backdrop heightens the sense of unease that fuels the genre. Simon Beckett, in Written in Bone, similarly evokes a sense of isolation by setting his story on a desolate Scottish island, creating a chilling mood. 

Genre-Specific Trends

Like all genres, crime fiction is influenced by market trends. Currently, regional and village-set mysteries are enjoying particular popularity. Ann Cleeves’ Vera and Shetland series offer regional flavour in stark landscapes, while M.C. Beaton’s Agatha Raisin series delivers cosy murders in the Cotswolds. These stories allow readers to take a murderous mini-break within the pages of a book.

A Satisfying Conclusion

Some genres can afford to leave questions unanswered—but crime fiction is not one of them. A case left unresolved, or a mystery without resolution, is almost guaranteed to frustrate readers. Your job as a crime writer is not only to tie up every loose end but to offer your readers a proper farewell. Allow your story time to wind down so that your readers can process the tension and adrenaline that kept them reading through the night.

Feeling inspired to send your detectives on a criminal chase? At novum publishing, we are always on the lookout for new crime novels—and we’ll assess yours free of charge and without obligation.

Let your fingers roam freely over your keyboard! 

Your team at novum publishing