- X - The Problem of the Negro as a Problem for Thought
- X Saves the World
- X Troop
- X vs. Y
- X-Clusively Female: The Cyberspaces of the David Duchovny Estrogen Brigades.
- X-Events
- X-Faktor
- X-Men and Philosophy
- X-Plan Parenting
- X-Ray Fluorescence Spectrometry (XRF) in Geoarchaeology
- X-rays for Archaeology
- X-Risk
- X-Veranstalter
- Xadrez De Humanas Palavras
- Xadrez à Luz do Sol
- Xander's Reasons / Jenna's Reasons
- Xangô, Meu Pai! O Orixá Rei
- Xaripu Community across Borders, The
- Xavier Zubiri
- XCED Presents: Better Together
- Xcogitate
- Xenofeminism
- Xenofemminismo
- Xenolinguistics
- Xenophanes of Colophon
- Xenophobia and Islamophobia in Europe
- Xenophobia in South Africa
- Xenophobie!
- Xenophon
- Xenosophia and Religion. Biographical and Statistical Paths for a Culture of Welcome
- Xenotropism and the Awakening of Literary Expatriatism through Writing Memoirs
- Xhosa Tales for the Coffee Table
- XI Costituzione di Damanhur
- Xi Jinping's New Development Philosophy
- Xi Jinping's Rise and Political Implications (Report)
- Xiangsheng and the Emergence of Guo Degang in Contemporary China
- Xiipúktan (First of All)
- Xinjiang
- Xinjiang and China's Rise in Central Asia - A History
- Xinjiang and the Chinese State
- Xinjiang and the Expansion of Chinese Communist Power
- Xinjiang in the Twenty-First Century
- Xinjiang: China's Muslim Borderland
- XML-based Content Management
- Xperiment
- Xperiment Guidebook
- Xtreme Honda B-Series Engines HP1552
- Xu Xiake (1586-1641)
- Xuanzang
- Xunzi
- Xurt'an
- XVI Аркан. Ответный удар
- XXL-Buch zum Schluss Machen und für Trennungen
- XXL-Leseprobe: Was hilft gegen Liebeskummer?
- XXX - Il dizionario del sesso insolito
- XYZ
- Xzenobia
- Xénophobie business
- Xénophon - Oeuvres Complètes
- Xô Depressão