Jump to ratings and reviews
Rate this book
Rate this book
Readers are at the controls of a science fiction adventure when a hike in the mountains in broad daylight becomes a nighttime encounter with creatures from another planet

114 pages, Mass Market Paperback

First published January 1, 1991

2 people are currently reading
66 people want to read

About the author

Edward Packard

169 books125 followers
Edward Packard attended and graduated from both Princeton University and Columbia Law School. He was one of the first authors to explore the idea of gamebooks, in which the reader is inserted as the main character and makes choices about the direction the story will go at designated places in the text.

The first such book that Edward Packard wrote in the Choose Your Own Adventure series was titled "Sugarcane Island", but it was not actually published as the first entry in the Choose Your Own Adventure Series. In 1979, the first book to be released in the series was "The Cave of Time", a fantasy time-travel story that remained in print for many years. Eventually, one hundred eighty-four Choose Your Own Adventure books would be published before production on new entries to the series ceased in 1998. Edward Packard was the author of many of these books, though a substantial number of other authors were included as well.

In 2005, Choose Your Own Adventure books once again began to be published, but none of Edward Packard's titles have yet been included among the newly-released books.

Ratings & Reviews

What do you think?
Rate this book

Friends & Following

Create a free account to discover what your friends think of this book!

Community Reviews

5 stars
13 (19%)
4 stars
19 (27%)
3 stars
22 (32%)
2 stars
11 (16%)
1 star
3 (4%)
Displaying 1 - 7 of 7 reviews
Profile Image for Amy.
87 reviews6 followers
May 29, 2019
I loved the choose your own adventures books when I was a child primarily for their novelty and immersive experience. I remember happening upon incredible looking endings and paging back forth trying to figure out the path for actually getting there and holding pages between six different fingers trying to keep everything in place. Total blast.

This book, however, fell flat for me. It felt pretty preachy throughout without suggested solutions or changes to behavior. There were even a few inconsistencies in the plot lines with one chain referencing knowledge that could only be gained through other chains. It was fun to read and choose as a family on our car trip and introduce our 8 year old to choose your own adventure, but this particular one isn't one that I'd recommend again.
Profile Image for Nick Jones.
346 reviews22 followers
August 22, 2021
One of the occasional insufferable after-school special entries in the Choose Your Own Adventure series, this book allegedly about aliens is actually a ham-handed attempt to bash the notion that pollution is bad into the heads of the readers, which is a shame because the other elements are handled very well for a CYOA book.
307 reviews2 followers
September 2, 2019
This is definitely a strong entry in the CYOA series. The mystery is established in the very first page, and various story threads unfold in disparate but compatible ways. On my first try I ended up killing an alien and leaving frustrated on a plane knowing its mystery would remain unsolved, and on my second try I essentially saved the aliens, the Earth, and all of humanity.
Profile Image for Josiah.
3,485 reviews157 followers
April 9, 2009
This would probably get two and a half stars, but the writing is excellent and tautly maintained, and for some reason it seems that the possibility exists for longer stories than in most other Choose Your Own Adventure books. Invaders from Within reminds me very much of "The Cave of Time", but they are still two unique stories with a great feel in the narrative that I like a lot. I really do love to read this book.
7 reviews
December 30, 2007
Invaders have come into your existence. Encounters withs with the invaders have brought you within their dome of influence,literaly. You find yourself breaking through a shell of disbelief and new understanding as "slimy" & it's invader race become a very real look at how we choose to live here on earth and treat our natural resources and the resources of others.
Profile Image for Sheila Read.
1,574 reviews40 followers
July 9, 2013
the adventures that I went through when I was bored I just read these books over and over again you would never get to the end of the story.
Displaying 1 - 7 of 7 reviews

Can't find what you're looking for?

Get help and learn more about the design.