Two books were made of the game. One [url=http://en.wikipedia.org/wiki/X-COM_:_UFO_Defense_-_A_Novel]by Diane Duane[/url] in 1995 and another [url=http://en.wikipedia.org/wiki/X-COM:_UFO_Defense_Novel_%28Russian%29]by Vladimir Vasilyev[/url] in 1997, both bearing the name X-COM: UFO Defense.