4400: Promises Broken

David Mack is the author of numerous Star Trek novels, including the USA Today best-seller A Time to Heal and its companion volume, A Time to Kill. Mack's other novels include Star Trek: DS9: Warpath, Star Trek Vanguard: Harbinger, Star Trek: S.C.E.: Wildfire, and numerous eBooks and short stories. Mack also cowrote two episodes of Star Trek: DS9, "Starship Down" and "It's Only a Paper Moon."