Spies in the Sky tells the thrilling tale of the reconnaissance pilots tasked with the risky job of taking aerial photographs over occupied Europe, and the boffins who invented a new science to analyse these images and uncover the enemies' secrets. Based at Medmenham, a country house in the Thames Valley, these men and women were an ingenious group. Their work provided some of the most vital intelligence of the war, from finding the Bismarck to tracking down Hitler's V weapons in 1944. 'A fascinating read and a significant contribution to the history of the Second World War' Professor David Reynolds, author of In Command of History'Taylor Downing's brilliant research has created a ripping yarn' The Sunday Express 'Spies in the Sky...combines the breathless courage of pilots...with the mild eccentricity of RAF Medmenham' Sinclair McKay, Telegraph'Spies in the Sky gives a new perspective to some of the most famous moments of the conflict' Robert McCrum, the Observer