Past Prologue (novel)
"These are the voyages" – as you've never seen them before!

Past Prologue is a Pocket TOS novel – the third and final novel in The Janus Gate series – written by L.A. Graf. Published by Pocket Books, it was first released in .

Summary 
From the book jacket
Thanks to the accidental triggering of alien technology, Captain Kirk has been banished to his own past. During a brutal massacre on Tarsus IV, Kodos the Executioner entered the history books as one of the most genocidal tyrants of the twenty-third century. As a boy, Kirk barely survived. Can he stand by now and let it happen again?

Lt. Kevin Riley is the only other survivor of Tarsus IV serving aboard the . His traumatic memories provide Spock's best hope of finding their time-lost captain — before Kirk alters their timeline forever!

Background information 
 The title references a quote from The Tempest by William Shakespeare: "What's past is prologue."

External link 
 

Novels