The U.S.S. Enterprise(TM) is on a peaceful mission at Starbase 12 when a bizarre cosmic phenomenon causes a Klingon ship to suddenly vanish -- with Spock aboard for the ride. Spock's last message from the Klingon ship is cryptic and frightening. The Klingons are traveling into the past, searching for the one man who holds the key to the furure. If they can kill that man, the course of history will be changed -- and the Federation will be destroyed!

Barbara Hambly is a New York Times bestselling author of fantasy and science fiction, as well as historical novels set in the nineteenth century. After receiving a master's degree in medieval history, she published The Time of the Dark, the first novel in the Darwath saga. Since then she has created several series, including the Windrose Chronicles, Sun-Cross, and Sun Wolf and Starhawk, in addition to writing for the Star Wars and Star Trek universes. She lives in Los Angeles.