John Eppler thought himself to be the perfect spy. Born to German parents, he grew up in Egypt, adopted by a wealthy family and was educated in Europe. Fluent in German, English and Arabic, he made the Hadj to Mecca but was more at home in high society or travelling the desert on camelback with his adopted Bedouin tribe. After joining the German Secret Service in 1937, in 1942 he was sent across the desert to Cairo by Field Marshal Rommel. His guide...