Regular price: $9.27

Membership details Membership details
  • A 30-day trial plus your first audiobook, free.
  • 1 credit/month after trial – good for any book, any price.
  • Easy exchanges – swap any book you don’t love.
  • Keep your audiobooks, even if you cancel.
  • After your trial, Audible is just $14.95/month.
Select or Add a new payment method

Buy Now with 1 Credit

By confirming your purchase, you agree to Audible's Conditions of Use and Amazon's Privacy Notice. Taxes where applicable.

Buy Now for $9.27

Pay using card ending in
By confirming your purchase, you agree to Audible's Conditions of Use and Amazon's Privacy Notice. Taxes where applicable.

Publisher's Summary

The powerful, long-awaited sequel to Yesterday's Son. Waves of distorted time are crashing through the universe - destroying everything in their path. Federation scientists pinpoint the source: the Guardian of Forever, the portal to the past where Spock had once journeyed back to meet his son, Zar. Only Spock's son has ever made mind contact with the Guardian - and now Spock, Kirk, and McCoy are reunited on a desperate mission to take the Enterprise to Gateway. Their goal is to bring Zar out of the past to contact the Guardian of Forever and save civilization. But Zar is leading his primitive people into a calamitous war - and unless Kirk and Spock can change the course of history, Zar is doomed to die!


For more Trek titles, browse our special Star Trek section!



(P)1989 Paramount Pictures, All Rights Reserved
Show More Show Less

Customer Reviews

Most Helpful
3 out of 5 stars
By Beverly on 04-18-08

Somewhat annoying

Being very familiar with this book as I have it in my paperback library I have to say that I would have enjoyed the audio version much more if the annoying sound effects in the recording were eliminated. At times they actually drown out the narration of James Doohan and Lenoard Nimoy.

Read More Hide me

2 of 2 people found this review helpful

5 out of 5 stars
By Diana M. O'Steen on 04-15-18

very nice abridgement, but...

This reading does bring you right into the action, expressing the emotions very well. But it's too short! I whole heartedly recommend reading the book for a more detailed and encompassing version of the story. Fans will be able to hear the voices of their favorite characters in their minds as they read. The more complete version of this story is even more satisfying than this well rendered audio version. Either way, it's easy to become emotionally involved and invested in Spock's reunion with his son. However, if you have only a limited time and need to be hands-free, this audiobook is a very good way to spend a little time in the Star Trek universe.

Read More Hide me
See all Reviews

Customer Reviews

Most Helpful
4 out of 5 stars
By Flink on 10-30-16

Optional sequel

It wasn't strictly necessary after Tomorrow's Son. But nice to see what had happened to Zar. After listening to many regular audiobooks, I found all the sound effects a bit distracting at first. But eventually I came to like them. It's super short and more of a radio play, than a traditional audiobook. If you have that mentality going in, you should enjoy it.

Read More Hide me
3 out of 5 stars
By dot_stockport on 06-18-16

not their finest hour

considering they manage to save theentire universe this time, this is a lacklustre affair that will make little sense to anyone who has not read or heard yesterdays son.

Read More Hide me
See all Reviews
© Copyright 1997 - 2018 Audible, Inc