[en] Far East Air Operations 1942-1945 (Despatches From the Front) Pen & Sword Aviation
[en] 1 Group Bomber Command · an Operational Record Pen & Sword Aviation
[en] Operations in North Africa and the Middle East 1942-1944 Pen & Sword Military
[en] Bomber Harris · Sir Arthur Harris' Despatches on War Operations 1942-1945 Pen & Sword Aviation
[en] Daylight Bombing Operations 1939-1942 Pen & Sword Aviation
[en] [Special Operations Group 01] • Trident's First Gleaming Createspace Independent Publishing Platform
[en] Fighter Operations in Europe and North Africa 1939-1945 Pen & Sword Aviation
[en] Thunder at Prokhorovka · A Combat History of Operation Citadel, Kursk, July 1943 Helion and Company
[en] Medieval Mercenaries · The Business of War Pen and Sword
[en] Operation Paperclip · the Secret Intelligence Program That Brought Nazi Scientists to America Little, Brown and Company
[en] [Stratton 03] • The Operative sphere
[en] Operation Gold Eagle
[en] [Special Operations Group 02] • From Russia Without Love Stephen Templin
[en] [Gutenberg 27244] • Operations Upon the Sea: A Study Createspace
[en] [Merkiaari Wars 04] • Operation Breakout Impulse Books UK
[en] Operation Massacre Seven Stories Press
[it] [saggi 1370] • Operazione Overlord Beat
[en] RAF WWII Operational and Flying Accident Casualty Files in the National Archives Pen & Sword Books Limited