Book excerpt: It starts with a single bomb, a vehicle IED that devastates Whitehall, the signal for hostilities to begin. As night falls, enemy paratroopers drop onto the Mall, their target, the British Prime Minister. As the capitals of Europe fall like dominoes, the caliphate war machine engulfs England. What remains of the UK’s armed forces head north, to an ancient border, where they must arm up, dig deep and prepare for the toughest battle of their lives, one that will mark the beginning of a far larger and more dangerous conflict. The INVASION UK SERIES takes readers on an adrenaline-fuelled, action-packed journey across a world plunged into global conflict. From the war-torn streets of London to the ice-capped mountains of the Himalayas, from the corridors of power in Washington DC to the marble palaces of a transformed Baghdad, the battle for political, military and ideological supremacy will sweep across the globe.