| epub ISBN | PDF ISBN | No. | TITLE |
| 9781782000020 | 9781849080026 | 3 | U-Boat Bases and Bunkers 1941–45 |
| 9781780962160 | 9781849080040 | 5 | Japanese Castles 1540–1640 |
| 9781782001294 | 9781849080064 | 7 | The Lines of Torres Vedras 1809–11 |
| 9781782001423 | 9781849080095 | 10 | The Maginot Line 1928–45 |
| 9781780962177 | 9781849080101 | 11 | Crusader Castles of the Teutonic Knights (1) |
| 9781782001300 | 9781849080118 | 12 | Fortresses of the Peninsular War 1808–14 |
| 9781782001454 | 9781849080170 | 18 | Norman Stone Castles (2) |
| 9781849080187 | 9781849080187 | 19 | Crusader Castles of the Teutonic Knights (2) |
| 9781780966298 | 9781849080255 | 26 | Afghanistan Cave Complexes 1979–2004 |
| 9781780961460 | 9781849080286 | 29 | US World War II and Korean War Field Fortifications 1941–53 |
| 9781780961408 | 9781849080323 | 33 | Special Forces Camps in Vietnam 1961–70 |
| 9781782000136 | 9781849080330 | 34 | Japanese Fortified Temples and Monasteries AD 710–1062 |
| 9781780969848 | 9781849080385 | 39 | Russian Fortresses 1480–1682 |
| 9781782000617 | 9781849080439 | 44 | American Coastal Defenses 1885–1950 |
| 9781782000662 | 9781849080460 | 47 | Fortifications of the Incas |
| 9781780969855 | 9781849080507 | 51 | Indian Castles 1206–1526 |
| 9781780967370 | 9781849080521 | 53 | Defending Space |
| 9781780969770 | 9781849080545 | 55 | Cathar Castles |
| 9781780969862 | 9781849080606 | 61 | Medieval Russian Fortresses AD 862–1480 |
| 9781780969879 | 9781849080729 | 73 | Hittite Fortifications c.1650-700 BC |
| 9781780961453 | 9781849081252 | 89 | The Atlantic Wall (2) |
| 9781780969886 | 9781849081283 | 90 | Greek Fortifications of Asia Minor 500–130 BC |
| 9781782000037 | 9781846039317 | 96 | The Fortress of Rhodes 1309–1522 |
| 9781780962191 | 9781849083010 | 99 | Defense of Japan 1945 |
| 9781849088831 | 9781849083164 | 105 | Forts of the American Frontier 1776–1891 |