Cold Sunset cover art

Cold Sunset

The new mystery novel in the bestselling espionage series, from the author of Gabriel's Moon

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Cold Sunset

By: William Boyd
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Pre-order for $48.62

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Summary

Brought to you by Penguin.

Cold War Moscow is a place smouldering with secrets. Gabriel Dax has been tasked with delivering a mysterious Blanco drawing to celebrated defector Kit Caldwell. But Caldwell is convinced the KGB suspects him of treachery, and he wants out now.

When Gabriel is ordered by his enigmatic handler Faith Green to help, he is pulled into a web of shifting loyalties and dangerous escape plans. As tensions rise and trust fractures, he is forced to confront the fine line between devotion and deception…
Cold Sunset, the third novel starring accidental spy Gabriel Dax, takes you deep into a shadow-drenched world where loyalty blurs, motives darken and every step could be fatal, in a tautly woven mystery from acclaimed bestseller William Boyd.

© William Boyd 2026 (P) Penguin Audio 2026

20th Century Espionage Historical Historical Fiction International Mystery & Crime Mystery Spies & Politics Thriller & Suspense
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Critic Reviews

William Boyd once again brings to the spy novel his particular storytelling genius (MICK HERRON)
Boyd is one of my favourite authors – he never disappoints (KATE ATKINSON)
Boyd is always engaging, intelligent and deeply satisfying. I rate him one of our greatest living novelists (PETER JAMES)
Extravagantly enjoyable
One of our most thrilling writers
For page-turning glamour, you can bank on a William Boyd novel to hit the spot
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