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Mystery beat sheet

The usual shape of a whodunit: crime, clues, a wrong answer, then the truth.

Use it with your book's length

How it works

A mystery is a game with the reader. The crime comes early, the clues are fair, and the answer is hidden in plain sight. Somewhere past the middle the sleuth gets it wrong, and that wrong answer makes the real one land harder.

This shape follows the common whodunit pattern. Get to the crime early: mystery readers get restless if the body hasn't shown up by the end of the first few chapters.

Good for: Mystery, cozy mystery, crime and detective stories.

Watch out: Play fair. The reader should have every clue the sleuth used, so the ending feels surprising and also right.

The 10 beats, and where they fall

BeatWhereIn 80,000 words
BeforeThe sleuth and their world, before the crime.0%0
The crimeA body, a theft or a disappearance. Get here early.5% to 12%4,000 to 9,600
Taking the caseWhy this sleuth has to solve it.15% to 20%12,000 to 16,000
First suspectsInterviews, clues and lies. Plant the real clue here, in plain sight.20% to 40%16,000 to 32,000
Midpoint twistA new crime or fact changes the whole picture.50%40,000
DangerThe killer notices. The sleuth is at risk.55% to 70%44,000 to 56,000
Wrong answerThe sleuth's theory falls apart, or the wrong person is caught.75%60,000
It clicksA small detail makes everything fit.80% to 85%64,000 to 68,000
The revealThe sleuth faces the killer and explains it all.85% to 95%68,000 to 76,000
AfterJustice, and life going back to a new normal.95% to 100%76,000 to 80,000

The places are rough guides, not rules. Plenty of good books move a beat by a chapter or two. Put in your own word count and chapters to see your book's numbers.

Other story shapes

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