Mackenzie Calhoun is a fictional character from the Star Trek universe. Created by Peter David, Calhoun is an extraterrestrial from the planet Xenex, and is captain of the Federation starship USS Excalibur.
Captain Mackenzie Calhoun, flanked by his mentor Jean-Luc Picard and Ambassador Spock, on the cover of the 1997 novel, Star Trek: New Frontier: House of Cards. Art by Keith Birdsong.
Star Trek: New Frontier is a series of interlinked novels written by Peter David, published by Simon & Schuster imprints, Pocket Books, Pocket Star, and Gallery Books, from 1997 to 2015. New Frontier was the first Star Trek tie-in fiction property not to be based on a television series. The series was created by John J. Ordover.
Cover of 1998 omnibus