- X, Y, Z. Prawdziwa historia złamania szyfru Enigmy
- X-Ray Vision
- Xanadu
- Xanten
- Xanthippe - Die Frau des Sokrates
- Xanthippe - Die Frau des Sokrates & Die ehrlose Herzogin
- Xavier Coppolani Fils de Corse, Homme d'Afrique
- XBX Plan for Physical Fitness
- Xenocitizens
- Xenophobia in South Africa
- Xenophon's Anabasis, or The Expedition of Cyrus
- Xenophon's Anabasis: Lessons in Leadership - Fresh Perspective on Military Leadership By Reevaluatin...
- XII Corps, Spearhead of Patton’s Third Army pt. II
- Xin Loi, Viet Nam
- Xinjiang and the Chinese State
- Xipe Totec. Notre Seigneur l’Écorché
- XIX Tactical Air Command and Ultra - Patton’s Force Enhancers in the 1944 Campaign in France
- Xtabay
- Xuxub Must Die
- XX
- XXth Century Sheet Metal Worker - A Modern Treatise on Modern Sheet Metal Work
- Xénophon - Oeuvres Complètes
- Xénophon et les grâces du pouvoir
- XÉRXĒS