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Mystery · 2010 · R

Think of a number

by John Verdon

A retired detective receives a letter — and then someone starts killing people

For17+GenreMysteryLength421 pagesRead time~11 hours

This analysis was generated by AI from publicly available reader reviews, literary criticism, and book discussions. It has not been verified by a BookLens community reviewer and may contain errors. Be the first to verify →

Content snapshot

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What's in this book, at a glance — five things readers want to know before they start.

Violence

A lot

Murders depicted with significant graphic detail; the killer's method is disturbing and the violence escalates

Language

Some

Some strong language in the crime thriller register

Sexual Content

Barely any

Minimal sexual content

Substance Use

None

No substance use

Emotional Intensity

A lot

The impossible nature of the killer's apparent abilities and the mounting evidence of a brilliant, disturbed mind create sustained psychological tension

What this book is about

John Verdon's debut thriller introduces Dave Gurney, a retired New York City detective pulled back into investigation when a former college acquaintance receives an impossible series of letters predicting the numbers he's thinking of. The impossible-seeming killer and the increasingly disturbing pattern of murders make for an inventive puzzle thriller. The violence escalates to genuinely graphic territory, and the psychological portrait of the killer is disturbing. One of the more impressive debut crime novels of the 2000s.

Notes for sensitive readers

Reader-flagged moments and themes that may affect your experience.

Graphic murder scenes

Disturbing portrait of a methodical killer

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