The Baghdad Set: Iraq through the Eyes of British Intelligence, 1941-1945. London/Cham: Palgrave Macmillan/Springer Nature, 2019. ISBN 9783030151829.

Espionage and Counterintelligence in Occupied Persia (Iran): The Success of the Allied Secret Services, 1941-1945. Basingstoke: Palgrave Macmillan, 2015. ISBN 9781137555564.

Nazi Secret Warfare in Occupied Persia (Iran): The Failure of the German Intelligence Services, 1939-1945. Basingstoke: Palgrave Macmillan, 2014. ISBN 9781137427892