Available now in paperback, this is the thrilling story of the brains behind those who helped Britain win WW2. A sister story to Bletchley Park and Enigma.

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

SPIES IN THE SKY is the thrilling, little-known story of the partner organisation to the famous code-breaking centre at Bletchley Park. It is the story of the daring reconnaissance pilots who took aerial photographs over Occupied Europe during the most dangerous days of the Second World War, and of the photo interpreters who invented a completely new science to analyse those pictures. They were inventive and ingenious; they pioneered the development of 3D photography and their work provided vital intelligence throughout the war.

With a whole host of colourful characters at its heart, from the legendary pilot Adrian 'Warby' Warburton, who went missing while on a mission, to photo interpreters Glyn Daniel, later a famous television personality, and Winston Churchill's daughter, Sarah, SPIES IN THE SKY is compelling reading and the first full account of the story of aerial photography and the intelligence gleaned from it in nearly fifty years.