Campbell wrote this book in the van Vogt style. Earth over all. Scientists of hyper brilliance. Testosterone flowing like Niagara Falls. Retrofit a space suit for invisibility, oh, 5 hours at the most. Test out an intergalactic ship, why bother? Aliens? Looks like humans with 2 thumbs. Communication? We'll use a newly learned technique, I just learned from the Venusovians last month. If you are into classic hard old-time SciFi this is perfect.

It’s a waste of time. Style of story telling is meant to impress nerds who like theoretical science. Its plot and characters are lacking.

A good addition the first book!

Good book very interesting

A fantastic sci-fi novel that keeps you interested for the whole way. Good narration as well! What a gem for a free book!

Fantastic narration. Story is slow to start with lots of fantasy technical talk so prepare yourself for that. Interesting story and fun dynamic. Not a single female character throughout the book, so take that as you will - very much a boys club kind of story. I would listen to this author’s work again though.

A very creative adventure, with loads of pseudo-science that has a vague plausibility to it that makes it all the more of a fun story. Mark Nelson is one of Librivox best sci-fi voices. Love his stuff!

good book and good listen for time spent with to listen to a book

Good book weird rnding

Great classic sci fi

Good old fashioned SiFi

Great narration of an action scifi.

Good classic sci fi

Love some sci-fi! Cool story GREAT narration!