<p>When British war hero-turned-adventurer <strong>Hugh Bulldog Drummond</strong> sails to Havana to answer an anonymous summons he expects a routine intelligence errand.<br>Instead a Royal Navy officer is gunned down on the pier before Drummond can even disembark-clutching a sealed envelope marked <strong>STRICTLY CONFIDENTIAL - CALYPSO FILE.</strong></p><p>From the smoky bars of Old Havana to sugar-refinery ruins from high-stakes casino tables to jungle strongholds near Santiago Drummond and the sharp-witted Lucía Ramos follow a trail of assassins coded ledgers and sabotaged freighters.<br>At the centre of the web lurks <strong>Mathilde Vianne - the legendary Crimson Widow</strong> a master spy once thought dead now orchestrating an arms-smuggling conspiracy designed to fracture the British Empire from within.</p><p>Facing ambushes on the Malecón a brutal trap in a derelict theatre and traitors in London's own corridors of power Drummond must survive a vendetta that spans oceans-before Operation Calypso sparks a war the world isn't ready for.</p><p>A <strong>30-chapter international thriller</strong> steeped in 1930s atmosphere - perfect for fans of classic Bulldog Drummond adventures high-stakes espionage and noir-tinted historical intrigue.</p>
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