The Entropy Effect (Star Trek: The Original Series)

A time-travel crisis threatens the very fabric of the universe—and Spock must race history itself in this thrilling and suspenseful novel set in the Star Trek: The Original Series.

When the USS Enterprise is summoned to transport a dangerous criminal to rehabilitation: the brilliant physicist, Dr. Georges Mordreaux, accused of promising to send people back in time, then killing them instead. But when a crazed Mordreaux escapes, he inexplicably bursts onto the bridge and murders Captain Kirk ...