- A History of the Office of Naval Intelligence, 1882-1942
- A history of the organization Delta Green belonged to before they moved to the Office of Strategic Services.
- The British counterpart to Delta Green.
- GRU Spetsialni Viedotstvo-8
- Soviet military intelligence and ghouls
- The Karotechia
- The German effort to control the Mythos for their own ends.
- Kokuryukai (The Black Dragon Society)
- The history of Japan's encounters with the Mythos.
- The Sluzhba Bezpeky
- The Security Service of the Organization of Ukrainian Nationalists, and its involvement with the Mythos
- Personnel Records
- Important individuals of Delta Green, PISCES, the Karotechia, and others
- Order of Battle
- Templates and histories of military, intelligence, and police agencies
- A Chronology of Delta Green and the Mythos
- A timeline of relevant events from history and the Mythos between 1933 and 1945
- Book of Phrases
- Some phrases relevant to WWII DELTA GREEN translated into different languages