Be an Interplanetary Spy


  This page is no longer being updated. For the new version, click here.

This twelve-book series designed by Byron Preiss Visual Publications was published by Bantam Books starting in 1983. The books combined the simple branching-story structure of the Choose Your Own Adventure books with visual puzzles; the ultimate result is a very heavily illustrated, video game-like gamebook series. Because the books encourage the reader to write in them, it's somewhat difficult to find "clean" copies.

The information on this page is as complete as my collection will allow. If you find any errors or have a copy of a book I'm missing, please send an e-mail to demiankatz@gmail.com.


  1. Find the Kirillian!
Author: Seth McEvoy
Illustrators: Marc Hempel and Mark Wheatley (original artwork), Steve Fastner (reissue cover)
First Published: June, 1983
ISBN: 0-553-23506-0 (original), 0-553-25863-X (reissue)
Length: 121 pages
Number of Endings: 16
Plot Summary: You must rescue a young prince and retrieve valuable jewels from an evil interplanetary criminal named Phatax.
Translations: Spanish, Swedish
My Thoughts: This isn't a bad start to the series... Some of the puzzles are fairly interesting, though the vast majority are exceedingly simple, pointless, or entirely based on random luck. This book was later released with a different cover, probably because Space Invaders look of the first cover illustration was a bit dated by the mid 80s.

  2. The Galactic Pirate
Author: Seth McEvoy
Illustrators: Marc Hempel (original artwork and reissue cover) and Mark Wheatley (original artwork only)
First Published: June, 1983
ISBN: 0-553-23507-9 (original), 0-553-25862-1 (reissue)
Length: 121 pages
Number of Endings: 25
Plot Summary: Marko Khen, an evil space pirate, has been mutating harmless animals into huge monsters and using them to terrorize innocent planets. You must find and stop him.
Translations: Spanish, Swedish
My Thoughts: This book is similar in quality to the previous one. Most of the puzzles are similar as well, being for the most part mazes and pattern recognition challenges.
The reissued version of this book is not part of my collection; the scan is courtesy of Jaret R. Morgan.

 3. Robot World
Author: Seth McEvoy
Illustrators: Marc Hempel and Mark Wheatley
First Published: August, 1983
ISBN: 0-553-23700-4
Length: 121 pages
Number of Endings: 23
Plot Summary: An experiment to see if robots can be used as settlers goes terribly wrong when the robots involved decide to destroy humans for their imperfection. You must stop the rebellion and rescue Dr. Cyberg, the creator of the robots.
Translations: Spanish, Swedish
My Thoughts: The difficulty level is a bit higher in this book; some of the puzzles require a bit more thought than those in the earlier books did. Some effort is also made to make the book slightly less linear by allowing the reader to visit a few locations in random order.

 4. Space Olympics
Author: Ron Martinez
Illustrators: Rich Larson and Steve Fastner (cover), John Pierard and Tom Sutton (interior)
First Published: August, 1983
ISBN: 0-553-23701-2
Length: 121 pages
Number of Endings: 15
Plot Summary: An evil spy named Gresh wishes to sabotage the first Space Olympics, and you must stop him while protecting the superathlete Andromeda.
Translation: Spanish
My Thoughts: This is the first book in the series not written by Seth McEvoy. It's slightly more wordy than McEvoy's work (which is not to say it has much text; none of these books do) and consequently has fewer puzzles. What puzzles are present are fairly simple. The most unusual thing in the book is a device which functions differently depending on the eye color of the reader.

 5. Monsters of Doorna
Author: Seth McEvoy
Illustrators: Marc Hempel and Steve Fastner (cover), Marc Hempel and Mark Wheatley (interior)
First Published: November, 1983
ISBN: 0-553-23941-4
Length: 121 pages
Number of Endings: 22
Plot Summary: A report of attacking monsters in a distant sector sends you on a mission to go farther from Spy Center than any agent has ever before gone, using an experimental X-wing (!) spacecraft.
Translation: Spanish
My Thoughts: This is largely an average book -- I wasn't particularly impressed with it, but I also have no major complaints. As with the rest of the series, many of the puzzles are rather pointless, but there are a few clever ones -- my favorite involved using shadows to determine the direction of the movement of two suns. Too many choices relied on memorizing details of illustrations seen long ago, though. The illustrations, which are a vital part of these books considering the brevity of the text, largely failed to impress me, but I can at least appreciate the creativity of conveying the height of the story's mysterious tower by forcing the reader to turn the book sideways and look at two consecutive two-page pictures; too bad the actual art is less than awe-inspiring. The final thing worth mentioning about this book is the fact that it turns out to be a direct sequel to a previous title; while I like this sort of thing, it didn't really advance the story much here.

 6. The Star Crystal
Author: Ron Martinez
Illustrators: Rich Larson and Steve Fastner
First Published: January, 1984
ISBN: 0-553-23942-2
Length: 121 pages
Number of Endings: 17
Plot Summary: You must guard the Star Crystal, a priceless jewel, as it is transported on an unusual ship known as the Moebius Express.
Translation: Spanish
My Thoughts: This is among the best books in the series. Its strangeness and use of optical illusions helps it immensely; the puzzles aren't very hard, but some of them are interestingly designed. As a bonus, the book also includes a model of the Moebius Express (a moebius strip, of course) to cut out and assemble.

 7. Rebel Spy
Author: Len Neufeld
Illustrators: Steve Fastner (cover), Alex Nino (interior)
First Published: June, 1984
ISBN: 0-553-24198-2
Length: 120 pages
Number of Endings: 20
Plot Summary: You must find and defeat a rebel intent on destroying the Interplanetary Spy organization.
Translation: Spanish
My Thoughts: The basic content of this book is unexceptional, but there are a couple of things worth noting. First of all, this picks up right where the last book left off; the reader is now a level two spy working with Callisto. This book also marks the point where the basic appearance of the series changed somewhat with a new logo and slightly different cover layout.

 8. Mission to Microworld
Author: Seth McEvoy
Illustrators: Alex Nino and Steve Fastner
First Published: August, 1984
ISBN: 0-553-24521-X
Length: 121 pages
Number of Endings: 24
Plot Summary: You receive a call from your old friend the biodroid, but when you soon discover that the planet he called from has disappeared.
My Thoughts: Due to the presence of the biodroid and Dr. Cyberg, this is something of a sequel to Robot World. Although this use of series continuity is interesting, the rest of the book is average.
Errata: At the bottom of page 5, you should turn to page 8 (not page 6 as the book says). Also, at the bottom of page 11, you should turn to page 6 (not page 8). If you follow the incorrect order in the book, you will skip some puzzles (I think it's 2).
(Thanks to Jason Horner for these corrections.)

 9. Ultraheroes
Authors: Len Neufeld and Michael Banks
Illustrators: Dennis Francis and Steve Fastner
First Published: November, 1984
ISBN: 0-553-24425-6
Length: 120 pages
Number of Endings: 16
Plot Summary: The evil brother of agent Tunk is attempting to use mind control to sabotage the training of the Ultraheroes, a group of superheroes who are presently learning how best to fight evil. You must find out whose mind he is controlling and stop him before it's too late!
My Thoughts: This isn't a bad entry in the series; while many of the puzzles are pretty pointless, enough are interesting to make up for the book's shortcomings. My biggest complaint, though, is that the comet swarm puzzle on pages 84 and 85 doesn't make any sense; neither of the solutions seem right to me.

 10. Planet Hunters
Author: Seth McEvoy
Illustrators: Steve Fastner (cover), Darrel Anderson (interior)
First Published: February, 1985
ISBN: 0-553-24532-5
Length: 121 pages
Number of Endings: 24
Plot Summary: You must capture the Planet Hunters, a trio of fiendish criminals who destroy entire planets for sport.
My Thoughts: This is a fairly uninteresting entry in the series. None of the puzzles are particularly inspired and the plot couldn't be much more linear.

 11. The Red Rocket
Author: Seth McEvoy
Illustrators: Steve Fastner (cover), Darrel Anderson (interior)
First Published: May, 1985
ISBN: 0-553-25078-7
Length: 121 pages
Number of Endings: 26
Plot Summary: To prevent an interplanetary war, you must retrieve a treaty lost in space centuries ago.
My Thoughts: This book refers back to almost all of the previous books in the series; it's a direct sequel to Robot World and it draws characters from various other stories. Apart from this it is fairly unexceptional.

 12. Skystalker
Author: Len Neufeld
Illustrators: Paul Rivoche (cover), Brian Humphrey (interior)
First Published: September, 1985
ISBN: 0-553-24894-4
Length: 119 pages
Number of Endings: 17
Plot Summary: A villain named Skystalker has stolen the Romular Sphere, an ancient and valuable artifact. Unfortunately, he is unaware of the fact that its contents are capable of destroying the entire universe! You must recover the Sphere before it is unwittingly opened!
My Thoughts: This isn't a bad end to the series, though it lacks finality... The book makes such a big deal out of the fact that it is your first level three mission that you can't help but think that there were further level three missions planned. The book's story and characters are typically minimalistic (especially the subplot involving Zillio, which is ridiculously underdeveloped), but its puzzles are often quite interesting and the artwork is amusing, especially the illustrations of Daxon. There are a couple of sloppy points in the book. First of all, on page 29, the stray sentence "When it sees you, it jumps up and runs away." doesn't seem to fit in where it shows up. Secondly, the puzzle on page 101 seems like it could have been presented in a slightly more readable fashion. Flaws aside, though, I enjoyed the book and wish that more had been written...


Spanish Translations

It appears that at least the first seven of these books were translated into Spanish, though I can only confirm the first four for certain. The Spanish series title was Haz de Espia Interplanetario; the books were published by Daimon.

 1. !Captura al Kiriliano!
Translation Of: Find the Kirillian!
Literal Translation of Spanish Title: Capture the Kirillian!
Translator: Edag, S. A.
First Published: 1986
ISBN: 968-6024-88-3
Length: 121 pages

 2. El Pirata Galactico
Translation Of: The Galactic Pirate
Literal Translation of Spanish Title: The Galactic Pirate
Translator: Edag, S. A.
First Published: 1986
ISBN: 968-6024-90-5
Length: 121 pages

 3. Robotlandia
Translation Of: Robot World
Literal Translation of Spanish Title: Robot World
Translator: Edag, S. A.
First Published: 1987
ISBN: 968-6024-99-9
Length: 121 pages

 4. Olimpiada Espacial
Translation Of: Space Olympics
Literal Translation of Spanish Title: Space Olympics
Translator: Edag, S. A.
First Published: 1987
ISBN: 968-410-006-X
Length: 121 pages

5. Los monstruos de Doorna
Translation Of:
Monsters of Doorna
This book is not part of my collection.

6. La estrella de cristal
Translation Of:
The Star Crystal
This book is not part of my collection.

7. Espia rebelde
Translation Of:
Rebel Spy
This book is not part of my collection.


Swedish Translations

At least three of these books were translated into Swedish as the "Bli en rymdspion" series.

1. ???
Translation Of:
Find the Kirillian!
This book is not part of my collection.

2. ???
Translation Of:
The Galactic Pirate
This book is not part of my collection.

3. Robotvärlden
Translation Of:
Robot World
This book is not part of my collection.


Demian's Gamebook Web Page (c) 1998-2003 Demian Katz