PRE-ORDER NOW - Published: 28/05/2026

Pre-order the whiplash-inducing spy thriller, for fans of Scott Mariani and Black Doves. `A freight train of a novel. Exhilarating, raw, unmissable' DAVID McCLOSKEY`Crackles with tension. Brilliant, exciting and worryingly believable' CHARLES BEAUMONT'Octagon bleeds authenticity from the first page to the last. Read it today!' JACK CARR, #1 NEW YORK TIMES BESTSELLING AUTHOR OF CRY HAVOC'An espionage novel that moves fast and hits hard' M.W. CRAVEN'A blistering thrill ride' VASEEM KHAN, author of the Q Mysteries'A smart, slick, adrenaline-fuelled adventure for fans of Ludlum and Fleming' CHARLES CUMMINGA DYING RUSSIAN SCIENTISTconfesses to his children what he did as a young man. A MURDERED SPYshares vital intelligence before he's ruthlessly assassinated in the English countryside. A RITUAL KILLINGhidden in a forest clearing in Sweden hints at something much worse. FORMER MI6 AGENT RUNNERStella McRae is the only person who can be trusted to investigate now her former employer has been compromised. EX-SAS OPERATORTommy Kane has always had Stella's back, but as the threats against them escalate, will his formidable skills be enough this time?OCTAGONA devastating plot against the West is already in train. Only Stella and Tommy stand in its way. And time is running out... 'A gritty, well-paced page-turner' THE CRITICPraise for C.J. Merritt:`A writer to put on your reading list!' - David Baldacci`A first-class blend of intrigue, suspense, and action. as propulsive as a Bourne movie.' - Charles Cumming, CWA Ian Fleming Steel Dagger winner`Very well done' - Anthony Horowitz`A tight, compelling thriller that never misses a beat.' - Lou Berney, CWA Ian Fleming Steel Dagger winner`Gripping' - Peter James

Binding: Hardback