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Welcome Aboard!

Announcing the release of the latest book from D. Arthur Gusner, Gepeto Memoir — a Gift of Love, the true story of the author's journey to earn the privilege of the companionship of a loving Guide Dog, an incredible buddy, a miracle with four paws, a wagging tail and wet nose.

A good book offers the best long-term return for your entertainment dollar, and best of all it requires no batteries. You are now but a single click away from acquiring one or more good books that will return hours of enjoyable reading.

 

For your reading pleasure, you can read below about each of the five intertwined Guardian hard science-fiction novels: Guardian Force, Earth Guardian, Guardian Probe, Guardian Strike, and Guardian Thunder. The series has been carefully refined to provide the best possible eBook and trade-quality paper-back editions.

Order Guardian series on Amazon or Barnes and Noble.

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Guardian Force (Book 1)

Five hundred years in the future, humanity's greatest discovery may also become its greatest threat.

When Guardian Force detects a mysterious sub-light probe entering the Solar System, Scout Ship Shey and crew expect to intercept an unknown object. Instead, they discover something impossible: traces of human blood aboard an ancient artifact, but from where?

Following the probe across unexplored space, the crew embarks on a dangerous mission that will challenge everything humanity believes about its origins, its future, and its place in the galaxy. What they discover could ensure mankind's survival... or bring about its extinction.

Blending authentic military strategy, hard science, and epic space adventure, Guardian Force launches D. Arthur Gusner's complete five-book Guardian Series. Perfect for readers who enjoy military science fiction in the tradition of The Hunt for Red October meets Battlestar Galactica, with the sense of discovery found in classic space exploration.

The complete Guardian Series:

  • Guardian Force

  • Earth Guardian

  • Guardian Probe

  • Guardian Strike

  • Guardian Thunder

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Earth Guardian (Book 2)

Humanity is no longer alone. Now it must decide whether it is ready for war.

Centuries after two branches of humanity were separated by time and the vastness of space, fate reunites them under the worst possible circumstances. An expanding alien empire known as the Kreel is conquering everything in its path, and Earth has suddenly become its next target.

Outmatched technologically and unprepared for an interstellar conflict, Earth's governments discover just how vulnerable they truly are. Their only hope lies with the distant world of Glas Dinnein and the battle-tested crews of the Guardian Force, whose resources are already stretched to the breaking point.

As alliances are forged and the threat of extinction grows, humanity must learn to stand together or face an enemy determined to erase every human world from the galaxy.

Blending authentic military strategy, hard science, and large-scale space adventure, Earth Guardian continues D. Arthur Gusner's complete five-book Guardian Series, raising the stakes in an epic saga of survival, courage, and discovery.

The complete Guardian Series:

  • Guardian Force

  • Earth Guardian

  • Guardian Probe

  • Guardian Strike

  • Guardian Thunder

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Guardian Probe (Book 3)

Five battle-weary Guardian Cruisers stand between humanity and a Kreel invasion.

Far from home and badly outnumbered, the crews receive a simple order: hold the line. With promised reinforcements uncertain and supplies running low, the defenders search desperately for any tactical advantage that might help them survive the coming battle.

Nearly one hundred light-years away, a lone Guardian Cruiser on deep reconnaissance faces its own final moments. Its crew is gone. Its hull is crippled. Only the ship's artificial intelligence remains.

Before destroying its attackers and itself in one last act of defiance, the AI transmits a Cobalt Blue encrypted message to Guardian Force headquarters. Hidden within that transmission is a mystery that could reshape the war and send Guardian Force deep into the heart of the Kreel Empire on a covert intelligence mission.

Blending military strategy, artificial intelligence, deep-space reconnaissance, and large-scale interstellar conflict, Guardian Probe expands D. Arthur Gusner's complete five-book Guardian Series.

The complete Guardian Series:

  • Guardian Force

  • Earth Guardian

  • Guardian Probe

  • Guardian Strike

  • Guardian Thunder

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Guardian Strike (Book 4)

The war for humanity has become a battle for the fate of the galaxy.

As the Kreel Empire and humanity wage an increasingly devastating interstellar war, neither side realizes they are no longer the only powers watching the conflict unfold.

From the shadows, an alliance of ancient civilizations known as the Elders quietly observes. Having guided the galaxy through countless ages, they now face an impossible question: which species, if any, deserves to survive?

Beyond the Milky Way, something far older has awakened. Drawn by the immense energy of war and death, an ancient evil begins extending its influence into the conflict, threatening not only humanity and the Kreel, but every civilization in the galaxy.

As Guardian Force prepares for the largest military campaign ever undertaken, the balance of power is about to change forever.

Blending authentic military strategy, hard science, and epic interstellar warfare, Guardian Strike is the explosive fourth novel in D. Arthur Gusner's complete five-book

Guardian Series.

The complete Guardian Series:

  • Guardian Force

  • Earth Guardian

  • Guardian Probe

  • Guardian Strike

  • Guardian Thunder

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Guardian Thunder (Book 5)

The final battle for humanity has arrived.

The Kreel Empire has conquered more than forty star systems, crushing every civilization that stands in its path. Now its relentless expansion threatens the last eleven human worlds, forcing humanity into a war where defeat means extinction.

Outnumbered and facing impossible odds, Guardian Force launches its most daring mission yet, taking the fight deep into the heart of the Kreel Empire in a desperate gamble to change the course of the war.

As ancient Elder civilizations watch and debate whether either side deserves to survive, events beyond time and space begin to converge. Three branches of humanity, separated across the stars and across time itself, must unite to determine the future of the human race.

Blending authentic military strategy, hard science, and epic interstellar warfare, Guardian Thunder delivers the thrilling conclusion to D. Arthur Gusner's complete five-book Guardian Series.

The complete Guardian Series:

  • Guardian Force

  • Earth Guardian

  • Guardian Probe

  • Guardian Strike

  • Guardian Thunder

 

The Guardian Saga reaches its unforgettable conclusion.

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D. Arthur Gusner

is a skilled weaver of imaginative tales and unfolding mysteries. Below are unsolicited reviews written by people who have already purchased and enjoyed the Guardian series, beginning with Guardian Force:

Buckeye64
5.0 out of 5 stars Outstanding blend of current conditions to be projected forward in time.
Reviewed in the United States on March 11, 2021
Verified Purchase

The writer has collected a good history of mankind’s development and established science to explain why we act the way we do as a society. I am looking foreword to book number 2 to see the direction the author is going to take us.
 
Buckeye64
5.0 out of 5 stars Exciting extension of book 1.
Reviewed in the United States on March 15, 2021
Verified Purchase

Book 2 keeps the character development along with the main story line from the first book. The use of the writers submarine warfare experience has been expressed well to space strategy.

margaret

5.0 out of 5 stars Good Sci Fi reading
Reviewed in the United States on October 24, 2021
Verified Purchase

I purchased this book (and all five books in the series) to give as a gift. The person receiving the gift said they were excellent and he'd be keeping the set to read again in the future.

Buckeye64
5.0 out of 5 stars Outstanding projection of space travel and civilization development.
Reviewed in the United States on March 25, 2021
Verified Purchase

All 5 books have captivated my attention since starting the first one about 2 weeks ago. The story line focuses on human history and projects one possible track for our future. The characters are all strongly developed. A great read.

Robert
5.0 out of 5 stars I couldn’t wait but didn’t want it to ever end.
Reviewed in the United States on January 15, 2021
Verified Purchase

This was a very satisfying end to the most favorite science fiction series I have ever read in the last 65 years.

MAG
5.0 out of 5 stars how much the serial stories are loved and missed
Reviewed in the United States on June 24, 2018

The “Guardian” series by D. Arthur Gusner is a reminder to all of us rabid Sci Fi fans,
how much the serial stories are loved and missed. This author’s true to form, science- based story-telling is up there with the likes of Asimov, Bradbury, Heinlein and O.S. Card. One can only wonder how these past to present and future writers have shaped a genre that extends far beyond our own limited realities.
 
As a scientist, Gusner’s knowledge of the universe is impressive and his stories reflect it. His knowledge of history and his understanding of human nature add dimension to the development of his characters and storyline. Read book 1 and you’re hooked. Then sit back and allow yourself to be entertained and awed by this thought-provoking 5-book series. (Guardian Force, Earth Guardian, Guardian Probe, Guardian Strike and Guardian Thunder)
 
wayneenz
5.0 out of 5 stars Top series
Reviewed in the United States on December 27, 2013
Verified Purchase

I found this a great story, and continuation to the series. I was initially a bit reluctant because it is some what dearer than most kindle books. So I originally only purchased the first part. That was more than enough, I was hooked. The day after I finished I bought the next two, a decision I haven't regretted.
 
The series is full of captivating characters, human, alien and a.i., and suitably bad enemies. There is also a continuing mystery about humanity, and its place in the galaxy. Topped off with rousing space battles. All in all a very addictive mix, one I can thoroughly recommend.
 
Jean-Paul
5.0 out of 5 stars Exciting adventure series. Must read!
Reviewed in the United States on February 3, 2015
Verified Purchase

One of the best science fiction series that I have read in years. Thrilling battle scenes and a great mixture of good vs evil.

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Galaxy Quest Books offers thrilling science fiction novels, heartfelt memoirs, and
groundbreaking discoveries about ancient wonders. Explore captivating stories and
uncover intellectual adventures designed to inspire and engage.

Copyright © 2026

D. Arthur Gusner, Author
Cambria, California

GalaxyQuestBooks@protonmail.com

All Rights Reserved

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