Underground Audiobook By Caleb Fast cover art

Underground

An Alien Invasion Military Sci-Fi

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Underground

By: Caleb Fast
Narrated by: Virtual Voice
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This title uses virtual voice narration

Virtual voice is computer-generated narration for audiobooks.

About this listen

There's a secret beneath the Bulwark...

It seems that the more time Matthew spends on the front the more things he finds.

Sometimes those discoveries are enclaves of ancient AI killer robots, sometimes it's a bunker, and other times, it's something even more unexpected than all of that.

In this case, that underground discovery is something that will change the way everyone in the Bulwark can live for the better.

However, mystery surrounds it and its discovery opens up more questions than Matthew is ready for. Read on to find out what it is!

Read The Battle for Allegra: Underground Today!!

Underground is the nineteenth book in the military science fiction series The Battle for Allegra. Dive into this tale as Matthew fights off aliens and an oppressive Galactic Empire. If you love reading tales of sci-fi action, rebels, and aliens, then Underground is the book for you!

This is the military sci-fi you've been waiting for. If you loved Star Wars, Stargate, and The Expanse, then you're sure to love The Battle for Allegra: Underground.

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The Battle of Allegra is a short story series that is intended to be read in order! Each episode (which will be at least 10,000 words long) tells more of the story. Join in and read them today to see what befalls both Matthew and an entire planet which are both thrust into war they didn’t ask for.

Anthologies & Short Stories Fiction Science Fiction Space Exploration Space Interstellar Short Story Military Star Wars
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