- eBookThe Battle for the Maginot Line, 1940Clayton Donnell
- eBookBreaking the Fortress Line, 1914Clayton Donnell
- eBookEben-Emael & the Defence of Fortress Belgium, 1940Clayton Donnell
- eBookThe Defence of Sevastopol, 1941–1942Clayton Donnell
- eBookSerien: FortressGordon L. Rottman
- eBookSerien: CampaignPeter Armstrong
- eBookSerien: New VanguardChris Bishop