Four (4) Star Trek novels. a) Star Trek 9, James Blish, 1973. b) Star Trek 11, James Blish, 1975. c) The Klingon Gambit, Robert Vardeman, 1981. d) Spock Must Die, James Blish, 1970. All have slightly yellowed pages, covers are intact, all pages appear intact and have some page marked bends. Overall they are in acceptable condition and are all readable. All are used books.