★★★½ ☆ — An original premise that kept be engaged & despite some narrative leaps, tied together well to have me onboard for the 2nd instalment.
John Verdon’s Think of a Number is one of those debut thrillers that announces its arrival with a premise so irresistibly high-concept you can’t help but lean in. A retired NYPD detective, Dave Gurney, receives an odd letter from an old acquaintance — one that eerily predicts the exact number the man will think of. When that man is later found murdered, the case spirals into a labyrinth of psychological games, cryptic clues, and a killer with an unnerving grasp of human behaviour.
From the outset, Verdon’s premise is magnetic. The slow-burn opening — all deliberate scene-setting, character introduction, and undercurrents of unease — hooked me more than most thrillers’ “action right out of the gate” approach. Verdon’s prose has a clean, quietly confident quality, and his lead, Gurney, is instantly likeable in that quietly stubborn, problem-solving way that suggests an ex-cop who’s never really hung up his badge mentally. His relationship with his wife, Madeleine, provides warmth and depth, while the supporting cast is drawn with just enough colour to feel distinct without tipping into caricature.
Yet for all the things Verdon does right, the novel stumbles in places. The central plot — clever though it is — occasionally slides into the far-fetched. There are moments when the killer’s machinations and Gurney’s deductions require a slightly charitable suspension of disbelief, and a few reveals stretch plausibility in ways that dilute the “I could see this happening” factor I look for in crime fiction.
Pacing is another mixed bag. There are sequences where the tension is so taut you could pluck it like a violin string, followed by stretches where the narrative loses momentum, drifting into slower, less urgent exchanges. While I actually enjoyed the measured early chapters, the inconsistency later on meant the book didn’t sustain the same level of propulsion it promised in its premise.
That said, I liked Think of a Number far more than I didn’t. The missteps are forgivable in the context of a first novel, and the strengths — character work, writing style, and a genuinely intriguing setup — outweigh the flaws. I closed the final chapter satisfied enough to already have book two, Shut Your Eyes Tight, on my radar.
A clever puzzle of a thriller, occasionally unbelievable but undeniably entertaining.
📚 Key Passages 📚
1. “Numbers are the devil’s language. They whisper things in ways you can’t ignore, like an itch you can’t reach, a truth you wish you could unknow.”
2. “He’d left the job behind, but the job had never left him. It clung to him like the smell of smoke in his clothes, a part of his skin, his blood, his thoughts.”
3. “The problem with monsters is that they rarely look like monsters. They look like neighbours, friends, men you might trust to hold your child’s hand while crossing the street.”