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This practical framework shows you 9 steps for line editing scenes in crime and thriller fiction so that every sentence pulls its weight and delivers the appropriate level of tension.
In this post
Why your novel’s not gripping the reader
If you feel like your novel’s not gripping the reader, it’s all too easy to blame something going on at story level. Perhaps it’s not twisty enough. Maybe the plot’s too thin. Perhaps the structure’s not balanced and the prose feels saggy in the middle of the book.
Before you rework the whole thing, take a step back and ask yourself if it’s the line work. The reason I say that is because line editing for crime fiction and thrillers takes place within the same foundational framework as any other genre. However, there’s an additional matter that needs engineering at line level: tension. That tension can’t just live at the macro level – in the story. It has to have a home in the sentences too. What is line editing?
Structural editing is SHAPING work. It examines big-picture elements like plot, pacing, structure, character arcs and coherence. Editors focus on improving the clarity and impact of the whole story.
Proofreading is QUALITY CONTROL work. It focuses on surface issues, amending spelling, grammar, punctuation, formatting and consistency issues to ensure the novel’s ready for publication. Line editing is EXPRESSION work. It sits in between the structural and proofreading stages, and considers what the scene is trying to do – whether that’s creating drama, building tension, revealing character, conveying information – and then making stylistic improvements to ensure the language actually achieves that. Use the framework below to check each scene and make sure that every sentence is pulling its weight. 1. Check for clarity
The first step is to check for clarity. Here, you’re making sure that:
Just because a line is lean doesn’t mean it needs to be boring. Sometimes writers need to tell it like it is and give the reader the cleanest pathway through so that they can live in the moment of the action rather than having to untangle it. This is particularly important in high-stakes situations, where the clock is ticking or a character’s in pursuit or being pursued. Examples
In the edited version, clarity has been improved by following a cleaner telling of the order of play: time (the watch), movement (hurried) and path (direction). I’ve also used more precise verbs ('checked' and 'hurried') to show how the character’s actions are controlled. This means we can ditch the adverbs ('urgently' and 'briefly') because those verbs do the heavy-lifting. I’ve also suggested free indirect speech ('What if the … no matter'). That’s more concise and takes us into the character’s headspace without the need for the cluttering filter words ('wondered' and 'realized'). Key principle: Keep tension intact my ensuring your reader doesn’t have to stop and re-read a sentence. 2. Manage narrative velocity with sentence length
Narrative velocity is the speed at which the reader perceives events taking place in a story. At scene level, it’s shaped by sentence structure, pacing and how quickly information and action are delivered.
Just because you’re writing crime fiction or a thriller doesn’t mean the pace has to rocket in every sentence. Instead, make sure it’s controlled in a way that shows rather than tells the perceived speed. How sentence length affects perceived speed As a general rule, long sentences tend to slow the pace of a scene, while short sentences accelerate it. There’s space for both, of course, so think about what’s happening in your scene in terms of stakes. Is danger increasing? Is time running out? Is something shocking revealed? Try shortening your sentences in those cases. For extra impact, use sentence fragments – though sparingly, because then the reader won’t notice that you’re doing it, only how it makes them feel. If, however, the scene is more reflective – perhaps a law-enforcement officer is trying to make sense of some inconsistent evidence, or they’re remembering a former case – a longer sentence will mirror the more stretched-out thought process. Example
Notice how in the example above, the leading longer sentences elongate the perceived time, reflecting the tedious graft that our character’s putting in. Then, as something unexpected is discovered, shorter sentences and fragments make the prose snappier. This truncates the moment into something immediate and jarring.
This mirrors real-life human experience. When we’re under pressure we tend to think in bursts, whereas when we’re in a safe, calm space we have more time for reflection. By controlling the length of a sentence in prose we can mirror that tension, or the lack of it. Key principle: Mix up sentence length so that you’re reflecting mood. 3. Build micro-tension with rhythmic tools
Rhythm determines how quickly a reader moves through a scene. Faster rhythms can convey urgency, action, fear, anger and shock. Slower rhythms can convey sadness, calm, thoughtfulness and introspection. Interruptions to rhythm force the reader to pay attention.
We’ve already looked at how sentence length affects pacing, so here are five more rhythmic devices that you can call on at line editing stage to create or ease tension. Think about what’s happening in the scene and what the character’s feeling, then consider which tool might be most effective:
Examples In all five examples below, there are different levels of micro-tension in play, and the rhythmic tools help mirror the emotional pressure experienced by the characters.
The repetition feels weighty and emphasizes the character’s desperate longing and the pressure he’s feeling.
The omission of conjunctions in the asyndeton example allows the list to flow rapidly, conveying urgency.
Postponing who’s in the chair builds suspense.
The succession of conjunctions mirrors the character’s exhausting pursuit.
Short one-line paragraph: The man in the photo was him.
By giving this pithy one-liner its own space, the revelation lands hard.
Key principle: Rhythmic tools help readers tap into character experience viscerally, but they need to be used judiciously so that that they don’t overshadow the story.
4. Regulate what the reader knows, and when
When there’s a gap between what’s happening and what the reader understands about it, you create suspense. It’s your chance to make them wait and wonder what’s going to happen – to tease them so that their anticipation builds! And all the while, tension increases.
If a particular scene has important information or a surprise in it, even a small one, look for line editing opportunities to delay the reveal by a line or two. If you have several revelations in your scene, think about how you can break them up so they land in stages. Example
In the example above, the tension builds as Marv grapples with his conundrum, and the reader isn’t any the wiser. We uncover the reveal at the same time as him.
I’ve kept that reveal short, concrete and slightly incomplete to maximize impact. This means the reader has to do some of the work in that moment. Further revelation and explanation can come later. 5. Control narrative point of view
What the reader knows, or doesn’t know, is key, so review the scene to check that you’ve reinforced the limits of your chosen narrative point-of-view style.
If you’ve used a limited or subjective viewpoint, which is common in crime fiction and thrillers, check that:
Examples (Arjun is the perspective character)
In the first example, Arjun can’t know that a person is behind him, never mind one holding a gun, precisely because this action is happening behind him. In the revised version, he senses movement, but that’s all. The reader knows only what the character knows, and if Arjun’s uncertain, so are we. That delay in information adds to the tension. Key principle: Limit the information reported in the narrative to what the perspective character can experience. 6. Strengthen your verbs
If you want to maximise tension, looking at your verbs is a great place to start. Small tweaks can make a big difference to whether an action feels like it’s gentler and happening at arm’s length, or strong and immediate.
Generally speaking, weak verbs dilute tension, while stronger ones amplify it, so line edit in a way that focuses the reader’s attention sharply on what’s being done. Example Imagine an escape scene and take a look at the following two options:
Nothing’s technically wrong with the first version, but the action feels expository. Note the verb – ‘was running’. It’s the past continuous tense, or action in progress. That’s grammatically unproblematic but it’s somewhat soft. This is exacerbated by the addition of a clause that reminds the reader what they already know given that this is an escape scene. The second version seeks to draw the reader into the moment. I’ve suggested a more forceful verb – ‘sprinted’. Using the simple past tense conveys urgency. I’ve also replaced the expository ‘trying to get away’ with an additional precise verb – ‘skidded’. Now we leave the reader to join up the dots, and instead of telling them what the intention is – to escape – we focus on what the character’s doing right now. It’s a small change, but one that transforms the energy in the scene and makes it feel more tense. Key principle: If a verb has scaffolding around it – ‘was [verb]ing’, ‘began to [verb]’, ‘seemed to [verb]’ – experiment with stripping it down so it’s more precise and conveys a sense of impact rather than effort. 7. Sharpen dialogue with subtext
Real-life speech is often filled with stuff that comes out of social norms (eg saying hello and goodbye, offering drinks, talking about the weather).
However, including this in your crime fiction or thriller risks ripping the tension out of a scene because it’s not what the reader’s interested in. When you’re line editing, look for opportunities to:
Example: Authentic but distracting
Example: Focused and tension-filled
The first version feels real enough, but it's rather expository. There’s no tension between the two speakers.
In the second version, the filler is gone, and one of the characters is cagey, then interruptive when their colleague goes on the defence. The subtext – that one of them missed something – is shown rather than told. Key principle: Dialogue should do triple duty – reveal character (voice), show the mood (the subtext of the conversation), and deliver intent (so that the story advances). 8. Ensure description matches the stakes
Line editing is also the time to consider whether the stakes in a scene are apparent. The reader should never forget what’s at risk, so check that characters’ actions and reactions match the situation.
Examples of high stakes could include:
In these situations, line edit to ensure your description is targeted and precise. That way, the information conveyed is vivid but delivered fast, creating more immediate pressure-based tension. Examples of low stakes could include:
In these situations, the description can be more detailed and the pace slower. You can still deliver tension, but it’s more stretched out because there’s no imminent threat. Examples
In the high-stakes example, the description is more focused on the immediate movement, which inflates a sense of urgency. Here, the prose creates a mood that’s abrupt and determined. In the low-stakes example, the character is able to move in a more procedural fashion, and take in their surroundings and notice the details. Here, the prose describes a drab, neglected space, and creates a bleak and institutional mood. Key principle: Ensure the level of detail given to the reader reflects the character’s ability to process it in any given situation. 9. Review your story beginnings and chapter endings
A super first line in a novel makes readers ask questions and creates a sense of intrigue that draws the reader in. Think of it as a tension pull.
A powerful closing line in a chapter withholds just enough resolution or adds a twist, which creates momentum. This is the tension push – the encouragement to turn the page and read the next chapter. Examples: Opening lines that pull readers into a novel
Those four novel opening lines provide mystery, imbalance and unanswered implication. Rather than explaining, they disturb the equilibrium and force the reader to ask questions. Examples: Closing lines that push readers onto the next chapter
Those four chapter closing lines function as momentum triggers. Each one either opens a new question, shifts the reader’s perception or interrupts their certainty. Key principle: Start the book with something that disrupts normal expectations of situation, logic or truth. End a chapter at a moment where certainty shifts. Summing up
Every story needs to have a great plot – a structured sequence of events where characters pursue goals, face obstacles and experience change through conflict and resolution. Getting that right is structural or developmental editing work – the shaping stage.
But every novel needs to work at line level too, because that expression work is what will keep readers interested and focused, rather than skimming. About Louise Harnby
Louise Harnby is a line editor, copyeditor and proofreader who specializes in working with crime, mystery, suspense and thriller writers.
She is an Advanced Professional Member of the Chartered Institute of Editing and Proofreading (CIEP) and co-hosts The Editing Podcast.
2 Comments
Excellent breakdown of how line editing shapes tension at the sentence level, not just through plot. The examples comparing weaker and stronger prose choices were especially helpful and easy to apply in real writing. This is a very practical guide for crime and thriller writers looking to improve pacing and suspense. 18/5/2026 10:29:38 am
Excellent framework for tightening suspense. The step-by-step approach makes line editing feel much more manageable, especially for crime and thriller writers trying to keep scenes sharp and tense. Leave a Reply. |
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