44 books in series
Osprey Fortress
Osprey Fortress is a 42-book series with 44 primary works first released in 2003 with contributions by Nic Fields, Stephen Turnbull, Peter Harrington, Ryan Lavelle, Christopher Gravett, David Nicolle, Paddy Griffith, Duncan B. Campbell, Stuart Reid, H.W. Kaufmann, J.E. Kaufmann, Angus Konstam, Konstantin Nossov, Samuel Rocca, Gordon L. Rottman, Keith Durham, Steven J. Zaloga, Michael Brown, Michael McNally, Carola Vogel, Peter Harrison, and Peter Dennis.
| #2 |  Hadrian's Wall AD 122-410
| 0 | 1 read | ||
| #5 |  Japanese Castles 1540–1640
| 0 | 1 read | ||
| #9 |  English Civil War Fortifications, 1642-1651
| 0 | 1 read | ||
| #11 |  Fortress 11: Crusader Castles of the Teutonic Knights (1) AD
| 0 | 1 read | ||
| #14 |  Fortifications in Wessex, c.800-1066
| 0 | 1 read | ||
| #17 |  Troy c. 1700-1250 BC Troy c. 1700-1250 BC
| 0 | 1 read | ||
| #18 |  Norman Stone Castles
| 0 | 1 read | ||
| #19 |  Crusader Castles of the Teutonic Knights, Vol. 2: The Stone Castles of Latvia and Estonia, 1185-1560
| 0 | 1 read | ||
| #21 |  Crusader Castles in the Holy Land 1097–1192
| 0 | 1 read | ||
| #22 |  Mycenaean Citadels c. 1350–1200 BC
| 0 | 1 read | ||
| #25 |  The Walls of Constantinople AD 324–1453
| 0 | 1 read | ||
| #31 |  Rome’s Northern Frontier AD 70–235: Beyond Hadrian's Wall
| 0 | 1 read | ||
| #32 |  Crusader Castles in the Holy Land 1192–1302
| 0 | 1 read | ||
| #34 |  Japanese Fortified Temples and Monasteries AD 710–1062
| 0 | 1 read | ||
| #42 |  The Vauban Fortifications of France
| 0 | 0 reads | ||
| #43 |  Roman Legionary Fortresses 27 BC–AD 378
| 0 | 1 read | ||
| #46 |  Castles and Tower Houses of the Scottish Clans 1450–1650
| 0 | 1 read | ||
| #47 |  Fortifications of the Incas: 1200–1531
| 0 | 1 read | ||
| #50 |  The Forts of Celtic Britain
| 0 | 1 read | ||
| #51 |  Indian Castles 1206–1526: The Rise and Fall of the Delhi Sultanate
| 0 | 1 read | ||
| #56 |  Rome’s Saxon Shore: Coastal Defences of Roman Britain AD 250–500
| 0 | 1 read | ||
| #57 |  The Great Wall of China 221 BC–AD 1644
| 0 | 1 read | ||
| #64 |  The Castles of Edward I in Wales 1277–1307
| 0 | 1 read | ||
| #65 |  The Forts of Judaea 168 BC-AD 73: From the Maccabees to the Fall of Masada
| 0 | 1 read | ||
| #66 |  The Castles of Henry VIII
| 0 | 1 read | ||
| #67 |  Japanese Castles in Korea 1592–98
| 0 | 1 read | ||
| #69 |  The Berlin Wall and the Intra-German Border 1961-89
| 0 | 0 reads | ||
| #70 |  Strongholds of the Border Reivers: Fortifications of the Anglo-Scottish Border 1296–1603
| 0 | 1 read | ||
| #71 |  The Walls of Rome
| 0 | 1 read | ||
| #72 |  German V-Weapon Sites 1943–45
| 0 | 0 reads | ||
| #73 |  Hittite Fortifications c.1650-700 BC
| 0 | 1 read | ||
| #74 |  Japanese Castles AD 250–1540
| 0 | 1 read | ||
| #76 |  Saracen Strongholds AD 630-1050: The Middle East and Central Asia
| 0 | 1 read | ||
| #80 |  British Forts in the Age of Arthur
| 0 | 1 read | ||
| #82 |  Scottish Baronial Castles 1250 – 1450
| 0 | 1 read | ||
| #83 |  Roman Auxiliary Forts 27 BC–AD 378
| 0 | 1 read | ||
| #84 |  Chinese Walled Cities 221 BC– AD 1644
| 0 | 1 read | ||
| #86 |  English Castles 1200–1300
| 0 | 1 read | ||
| #90 |  Greek Fortifications of Asia Minor 500–130 BC: From the Persian Wars to the Roman Conquest
| 0 | 1 read | ||
| #91 |  The Fortifications of Ancient Israel and Judah 1200–586 BC
| 0 | 1 read | ||
| #92 |  Strongholds of the Picts: The Fortifications of Dark Age Scotland
| 0 | 1 read | ||
| #97 |  Colditz: Oflag IV-C
| 0 | 0 reads | ||
| #98 |  The Fortifications of Ancient Egypt 3000–1780 BC
| 0 | 1 read | ||
| #104 |  Fortress Monasteries of the Himalayas: Tibet, Ladakh, Nepal and Bhutan
| 0 | 1 read |