Star Trek: Spock Must Die!

During a routine mission in an uncharted area of space, Capt. Kirk and the crew of the starship U.S.S. Enterprise received a report that the Klingon Empire had mounted a major attack on the Federation...Such an attack should have been immediately suppressed by the peace-loving Organians - but the Organians and their planet had completely disappeared - possibly destroyed by the warlike Klingons...First Officer Spock entered the transporter chamber. He intended to discover the fate of the missing planet. But as the whine of the machine died down, out from the chamber stepped two Mr. Spocks... identical...alike in every way and both claiming to be the original. For the sake of the Enterprise one of them had to be destroyed...but which one?

Published 1974, Corgi Book.

Binding of book is loose. Sunned covers with moderate shelfwear, some foxing and creasing on covers of book. Heavy tanning and foxing on edges of book. Annotations in pen and moderate foxing on insides of covers. Moderate foxing and few waterstains on certain pages.