| X-men by Steve Lyons - 2003 - 272 pages |
| X-Men by Kristine Kathryn Rusch, Dean Wesley Smith - 2000 - 256 pages |
| X-men 2 by Chris Claremont - 2003 - 408 pages |
| X-Men 2 by Chris Claremont - 2003 - 256 pages |
| X-Men 2 by Chris Claremont, Zak Penn, David Hayter - 2003 - 416 pages |
| X-Men(tm) The Last Stand by Chris Claremont - 2006 - 337 pages |
| X-Men: The Brood Saga by Marvel Comics Staff - 1996 - 128 pages |
| X-Men: The Brood Saga by Marvel Comics Staff - 1996 - 128 pages |
| X-Universe Volume One by Darren Astles - 2004 - 440 pages |
| Xasitchaine by Adam Sims - 2008 - 644 pages |
| Xasitchaine by Adam Sims - 2008 - 644 pages |
| Xavras Wyżryn i inne fikcje narodowe by Jacek Dukaj - 2004 - 273 pages |
| Xcrath! by Harry Gervais - 2004 - 258 pages |
| Xeno Gods and Demons Space and Time the Series by Kal Keller - 2007 - 544 pages |
| Xenocide by Orson Scott Card - 2009 - 416 pages |
| Xombies: Apocalypso by Walter Greatshell - 2011 - 304 pages |
| Xombies: Apocalypticon by Walter Greatshell - 2010 - 320 pages |
| Xtoriez by G. L. Strytler - 2011 |