Rudi Graf used to dream of sending a rocket to the moon. Instead, he has helped to create the world\'s most sophisticated weapon: the V2 ballistic missile, capable of delivering a one-ton warhead at three times the speed of sound. In a desperate gamble to avoid defeat in the winter of 1944, Hitler orders ten thousand to be built. Graf is tasked with firing these lethal \'vengeance weapons\' at London. Kay Caton-Walsh is an officer in the Women\'s Auxiliary Air Force who joins a unit of WAAFs on a mission to newly liberated Belgium. Armed with little more than a slide rule and a few equations, Kay and her colleagues will attempt to locate and destroy the launch sites. As the death toll soars, Graf and Kay fight their grim, invisible war - until one final explosion of violence causes their destinies to collide ... Product Information: • ISBN: 9781787460980 • Author: Robert Harris • Publisher: Arrow • Format: Paperback • Pages: 400 • Dimensions: 19.7 x 12.9 x 2.4 cm