Gideon's Vote by J.J. Marric aka John Creasey First Edition Hodder & Stoughton 1964. Completely free of inscriptions, foxing or toning. A fine copy in like dust jacket, not price clipped. 

In J.J. Marric's Gideon's Vote (1966)—pen name of John Creasey—Scotland Yard Commander George Gideon grapples with a powder keg during Britain's general election. As polls heat up, the radical Ban the Bomb party clashes with the fascist Q Men, a paramilitary outfit scheming to crown their leader dictator through orchestrated violence, from candidate assassinations to the brazen theft of an atomic device.
Amid protecting politicians from burglars and bomb threats, Gideon juggles routine crimes—murders, muggings—that persist in London's underbelly. With his unflappable grit and keen procedural eye, he navigates ideological minefields, averting chaos on polling day while glimpsing the toll on his devoted family. Marric's taut procedural dissects 1960s political fervor, where ballots and bullets blur in a race for democracy's survival.