Star Trek: The Covenant of the Crown
THE SHADDAN CROWN IS THE KEY TO POWER -- AND THE KLINGONS HAVE THE ADVANTAGE!
An Enterprise shuttle is forced to crash-land in a violent storm on the barren planet Sigma 1212. Spock, McCoy and Kailyn, the beautiful heir to the Shaddan throne, survive in the near disaster.
Pursued by primitive hunters and a band of Klingon scouts, they must reach the mountain where the fabulous dynastic crown is hidden. With the help of Spock and McCoy, and her own fantastic mental powers, Kailyn must prove that she alone is the true heir to the throne.
Should they fail, they will open the door for Klingon takeover of the whole quadrant -- and the galaxy's hope to live long and prosper will fall in the shadow of a cruel tyranny!
Great Spock and McCoy story!
One of my favorite classic Star Trek novels! Spock and McCoy help a princess find her true path! Highly recommended!