Over the years, I have accumulated a comprehensive collection of publications about castles and other fortifications, which has proven invaluable for my personal exploration and as a resource for this website. These are the ones about Syria.
Castles and Archaeological Sites in Tartous, The by Dr. Z. Hanna (Sidawy Printing House) in English isbn n/a
Citadels and Castles in Syria by A. Sateh (Dar Dimashq & Atlas) in English/Arabic isbn n/a
Krak des Chevaliers und die Kreuzfahrer by H. Jawish (Unknown) in German isbn n/a
Saladin und seine Burg by H. Hakim / H. Jawish (Unknown) in German isbn n/a