This is an account of the British intelligence operations based in both India and London, which defended the Indian Empire against subversion during the first two decades of the 20th century. It is concerned with the threat to the British Raj posed by the Indian revolutionary movement, the resulting development of the imperial intelligence service and the role it played in World War I.

Sun Tzu said that it is as important to know yourself - and by extension, your allies - as it is to know your enemies. This is a study of the murky, ultra-sensitive business of gathering intelligence among, and forming estimates about, friendly powers, and friendly or allied military forces.

As a fully documented study of a Second World War Secret Intelligence Service (SIS) operative, Our Man in Yugoslavia is absolutely unique.

Its subject is Owen Reed, an army officer recruited into SIS in the summer of 1943 and then parachuted in to German-occupied Croatia to work with Tito's Partisans and other Allied secret organisations. After reporting back to London in July 1944, Reed returned to Yugoslavia to find relations with the Partisans deteriorating. His erstwhile comrades began working against him and the intelligence he passed to the SIS came increasingly to...

During the second half of the 20th century, intelligence co-operation between the three North Atlantic powers of America, Britain and Canada played a vital role in Western struggles against Nazi Germany, Imperial Japan, Soviet Russia and their lesser allies.