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Publisher's Summary

Eighteen years ago the Starship Enterprise thwarted an alien invasion from another universe, and Captain Robert April took possession of the interdimensional transfer device that made it possible. Since then each captain of the Enterprise, from Christopher Pike to James T. Kirk, has guarded this secret with his life.

Now Romulan agents have succeeded in stealing the device and are using it to banish Ambassador Sarek and Councillor Gorkon to an unknown realm in the midst of their groundbreaking Federation-Klingon peace negotiations. With time running out as interstellar war looms in one universe - and alien forces marshal in another - will Captain Kirk and his crew preserve the tenuous peace and reclaim the key between the dimensions?

©2016 CBS Studios, Inc. All rights reserved. STAR TREK and related marks are trademarks of CBS Studio, Inc. All rights reserved. (P)2016 CBS Studios, Inc. All rights reserved. STAR TREK and related marks are trademarks of CBS Studio, Inc. All rights reserved.

What members say

Average Customer Ratings

Overall

  • 4.5 out of 5 stars
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    308
  • 4 Stars
    135
  • 3 Stars
    45
  • 2 Stars
    11
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    4

Performance

  • 4.5 out of 5 stars
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    356
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    82
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    25
  • 2 Stars
    2
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    2

Story

  • 4.5 out of 5 stars
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    278
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    108
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    62
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    15
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    7
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  • Overall
    2 out of 5 stars
  • Performance
    4 out of 5 stars
  • Story
    2 out of 5 stars

Weak

Good narrator, interesting story, terrible dialogue. I heard they wrote these books on a very tight deadline. It shows.

1 of 1 people found this review helpful

  • Overall
    3 out of 5 stars
  • Performance
    5 out of 5 stars
  • Story
    3 out of 5 stars

Struggled to Finish

As a fan of the original Star Trek TV series it was just okay overall and I struggled to listen to it all the way through. (The first book in the series was really good, the second is the same as the third.) The story is okay, but you have to be fan to really like it. Robert Petkoff's performance is the best part. He has each Star Trek character down and is near spot-on with the accents. I would only recommend this book to Star Trek fans.

1 of 1 people found this review helpful

  • Overall
    5 out of 5 stars
  • Performance
    5 out of 5 stars
  • Story
    5 out of 5 stars

Great Trilogy

Loved this story. I've always wanted more stories with Number One and her back story is very satisfying.

  • Overall
    2 out of 5 stars
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    5 out of 5 stars
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    2 out of 5 stars

Uneven

The underlying premise of this series was great. The execution across the three book series was uneven at best. The first book set the scene well, and is probably the best. The second book contained extensive exposition that was frustrating for anyone who had read the first book, and was overall weak. This book had good moments interspersed with dreadful aspects. Overall the theme of the three books appears to be that all women in leadership positions act irrationally, lead those who follow them to disaster, and this situation is saved by the long suffering men who come to their aid, or remove them.

  • Overall
    4 out of 5 stars
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    5 out of 5 stars
  • Story
    3 out of 5 stars

Worth a listen

Book three ties up everything nicely. Moves along a little faster than the second. It’s worth a listen if you are a fan. Robert P does a stellar job as always. He helps put you in the setting.

  • Overall
    5 out of 5 stars
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    5 out of 5 stars
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    5 out of 5 stars

good listen

Very good conclusion to a good story. Haven't read many original Star Trek books but this series is worth a listen.

Audible 20 Review Sweepstakes Entry

  • Overall
    4 out of 5 stars
  • Performance
    5 out of 5 stars
  • Story
    3 out of 5 stars

jumps around too much

it's great, it's original Star trek. But this story has so many sub stories, I just never was immersed; probably also a problem as I listen to it at night before I go to sleep. Really great narration!

  • Overall
    5 out of 5 stars
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    5 out of 5 stars
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    5 out of 5 stars

Refreshingly Enjoyable

Since I listened to the series out of order, this was the first Star Trek audio book I have listened to and I found it very enjoyable. It was fun to listen to the descriptions of the familiar characters and heard about a new adventure. I look forward to listening to more.

  • Overall
    5 out of 5 stars
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    5 out of 5 stars
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    5 out of 5 stars

Great Story in Classic Timeljne

I'd love to hear more. Especially by authors like Greg Cox who wrote the first in this series. He very well gets Star Trek.

  • Overall
    5 out of 5 stars
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    5 out of 5 stars
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    5 out of 5 stars

Narrates like a solid episode

What made the experience of listening to Purgatory's Key the most enjoyable?

Advancing the story line - a little disappointing that it was wrapped up so quickly like an original ST series episode.

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  • Overall
    2 out of 5 stars
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    4 out of 5 stars
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    2 out of 5 stars
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  • Amazon Customer
  • 04-08-18

Tedious

The other two novels in the series were great, this is slow and ponderous and way too long.

I am halfway through and I have given up.

  • Overall
    5 out of 5 stars
  • Performance
    5 out of 5 stars
  • Story
    5 out of 5 stars
Profile Image for Gunhild
  • Gunhild
  • 01-09-18

I love this in depth adventure into the unknown!

I would recommend it to trekies and non-trekies alike. great ending to the trilogy. enjoy

  • Overall
    5 out of 5 stars
  • Performance
    5 out of 5 stars
  • Story
    5 out of 5 stars
Profile Image for Mark Shackleford
  • Mark Shackleford
  • 04-22-17

excellent...... 😎

sometimes you can read or listen to a Star Trek book and think, "is that it", but not this one, i enjoyed it throughly ....
and you have the rare joy of it being unabridged ....... i wont give away any plot twists, but surfice to say its well worth getting ...... 😎

  • Overall
    5 out of 5 stars
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    5 out of 5 stars
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    5 out of 5 stars
Profile Image for Jane Barker
  • Jane Barker
  • 01-14-17

Great story

Loved this story. The story was great. It kept me company on my long trips.

  • Overall
    4 out of 5 stars
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  • Stov
  • 11-05-16

Weakest of the trilogy, still good

A bit slower than the previous books, still good, but a bit slower paced that the previous two

  • Overall
    4 out of 5 stars
  • Performance
    5 out of 5 stars
  • Story
    4 out of 5 stars
Profile Image for Ron
  • Ron
  • 11-05-16

terrific reader

Robert petkoff's ability to mimic the voices from the original series is spot on. This story is typical Star Trek: great if you're in to it, otherwise a bit cliché. However, it IS pure escapism and the reading is engaging; it's easy to lose oneself for a number of hours without needing to pay close attention.

  • Overall
    4 out of 5 stars
  • Performance
    5 out of 5 stars
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    5 out of 5 stars
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  • Kindle Customer
  • 09-06-16

A wild ride

This the third and final book was just as good. And I still could not see how this would end.
Think I listen to it again 9/10