When a transporter experiment goes horribly awry, suddenly there are two Mr. Spocks! One is the true First Officer of the Enterprise. The other is his complete opposite, a traitor whose very existence poses a grave threat to the crew, the ship, and the Federation itself. One of the Spocks must die. But which one ... ?
Spock Must Die! (Star Trek Adventures, #1)
ISBN 13: 9780553246346
Publication Date: March 01, 1985
Publisher: Spectra Books
Author: James Blish