When the Guardian of Forever malfunctions, the course of time runs amok, and the Star Trek crew undertakes a desperate mission to contact the Guardian, five thousand years in the past, and to bring Spock's son, Zar, forward in time
- Pages
- 303
- Published
- 1988
- Publisher
- New York : Pocket Books ; Markham, Ont. : Distributed in Canada by PaperJacks
- Language
- English
- ISBN
- 9780671603717