Child of Two Worlds
Child of Two Worlds is a Pocket TOS novel written by Greg Cox. Published by Pocket Books, it was first released in .

Summary 
From the book jacket
The year is 2255, not long after the events of the Original Series episode . A young Spock is science officer on the , under the command of Captain Christopher Pike, when an outbreak of deadly Rigelian fever threatens the crew. Reviewing the Starfleet medical database, Dr. Phillip Boyce comes up with a highly experimental and untested new treatment that might save the crew. Just one problem: it requires a rare mineral substance, ryetalyn, which is not easily obtained… except on a remote alien colony near the Klingon border. But borders are somewhat blurry in this part of the galaxy. Pike will need to tread carefully in order to avoid provoking an armed conflict with the Klingons – or starting an all-out war.

Background information 
 Cover art and design by Alan Dingman.

External link 
 

Novels