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Undying Mercenaries Books in Order

by B. V. LarsonScience Fiction & Fantasy

25 books so far (book 26 is due November 24, 2026). They run from Steel World (2013) to Hell World (2026). Rated 4.6 across 109,958 listener reviews.

Next Undying Mercenaries book

Spawn World

Book 26 · out November 24, 2026 · preorder now

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Reading order

  1. Steel World

    Book 1 2013 4.4 (11.9k)

    In the 20th century Earth sent probes, transmissions, and welcoming messages to the stars. Unfortunately, someone noticed....

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  2. Dust World

    Book 2 2014 4.6 (8.7k)

    The Galactics arrived with their Battle fleet in 2052. Rather than being exterminated under a barrage of hell-burners, Earth joined a vast Empire that spans the Milky Way....

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  3. Tech World

    Book 3 2014 4.6 (7.6k)

    The Galactics arrived with their Battle fleet in 2052. Rather than being exterminated under a barrage of hell-burners, Earth joined a vast Empire that spanned the Milky Way....

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  4. Machine World

    Book 4 2015 4.6 (7.2k)

    In the fourth book of the series, James McGill is up for promotion. Not everyone is happy about that, and McGill must prove he's worth his stripes....

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  5. Death World

    Book 5 2015 4.6 (6.7k)

    Unknown aliens attack Earth. Their planet is uncharted, mysteriously having avoided detection for centuries....

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  6. Home World

    Book 6 2016 4.7 (8k)

    When the Earth is invaded by a rival empire, James McGill's legion must defend the Home World....

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  7. Rogue World

    Book 7 2017 4.7 (7.2k)

    The Galactics arrived with their Battle Fleet in 2052. Rather than being exterminated under a barrage of hell-burners, Earth joined a vast Empire that spanned the Milky Way....

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  8. Blood World

    Book 8 2018 4.7 (6.4k)

    A dirty deal was struck. Humanity was allowed to keep 300 rebellious worlds. In return, we declared war on a powerful enemy from beyond the frontier....

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  9. Dark World

    Book 9 2018 4.7 (6.1k)

    Two expanding interstellar powers are about to meet in battle. After the collapse of the Cephalopod Kingdom, Humanity claimed the 300 rebellious worlds it left behind.

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  10. Storm World

    Book 10 2019 4.7 (4.2k)

    In an unprecedented first, Earth sends a message to Mogwa Prime. Unfortunately, the messenger is not met with enthusiasm. Misunderstandings soon threaten all of Humanity.

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  11. Armor World

    Book 11 2019 4.7 (5.2k)

    In a twist of fate that rocks the Galactic Empire, James McGill finds himself negotiating the future of a thousand inhabited worlds....

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  12. Clone World

    Book 12 2019 4.8 (4.7k)

    James McGill is called upon for a sabotage mission, one that only a man of his unique talents can handle. Unfortunately, he performs too well, and our enemies from Rigel are enraged. They come for us, and war is declared....

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  13. Glass World

    Book 13 2020 4.7 (3.8k)

    The Galactics arrived with their Battle Fleet in 2052. Rather than being exterminated under a barrage of hell-burners, Earth joined a vast Empire that spanned the Milky Way....

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  14. Edge World

    Book 14 2020 4.7 (3k)

    A lonely planet circles a star on the very border of Province 921. Critical resources produced there are claimed by both the Mogwa and the Skay. War between the Galactic giants becomes more likely every day.

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  15. Green World

    Book 15 2021 by B.V. Larson 4.7 (3.5k)

    Rebels build a secret base on Green World. Their plan is to attack Earth and retake all the planets the humans have conquered.

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  16. Ice World

    Book 16 2021 by B.V. Larson 4.7 (3.5k)

    Long before Earth began conquering her neighboring stars, Legion Varus was deployed on Tau Ceti. Valuable and highly illegal treasures were stolen during the campaign, but McGill never gave it a second thought.

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  17. City World

    Book 17 2022 by B.V. Larson 4.8 (3.4k)

    Earth’s entire fleet and all her legions are conscripted by the Galactics. Centurion McGill of Legion Varus is among countless troops pressed into service as cannon fodder for the Empire.

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  18. Sky World

    Book 18 2022 by B.V. Larson 4.8 (2.5k)

    Earth is locked in a dangerous arms race with Rigel. McGill’s efforts at diplomacy are disastrous. Events spin out of control and interstellar warfare consumes the outer provinces of the Empire.

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  19. Jungle World

    Book 19 2023 by B.V. Larson 4.8 (1.1k)

    A new threat arrives from the rim of the galaxy. From the colorless depths of space, unknown invaders strike worlds across the Frontier Zone.

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  20. Crystal World

    Book 20 2023 by B.V. Larson 4.7 (1.3k)

    The Silicoids are a growing threat from beyond the frontier. Launching waves of crystalline drones, they ravage colonies all along the border of the Empire.

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  21. Throne World

    Book 21 2024 by B.V. Larson 4.7 (1.2k)

    The Galaxy is ruled by a single Empire—but the Imperial throne is empty. The machine races demand a turn at the job, but the organics refuse to allow it. For more than a century, the Galactics have battled for supreme power.

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  22. Rebel World

    Book 22 2025 by B.V. Larson 4.5 (939)

    When a towering alien monolith crashes onto James McGill's family farm, it triggers events that could spark a galaxy-wide war. Things have gone bad among the colonies.

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  23. Rage World

    Book 23 2025 by B.V. Larson 4.7 (712)

    The Rebellion against Earth expands to new worlds. Left to die on a volcanic world by the Skrull, McGill and his mercenaries face waves of missile attacks with nowhere to hide.

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  24. Demon World

    Book 24 2025 by B.V. Larson 4.7 (646)

    When Earth's colonies go silent, Legion Varus drops onto Kepler-62 expecting a routine investigation. Instead, they find something far worse than death. The colonists aren't dead—they're changed.

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  25. Hell World

    Book 25 2026 by B.V. Larson 4.8 (595)

    Four hundred degrees! Toxic atmosphere! Gravity beams that crush men in armor like beer cans! Welcome to Infernus. Legion Varus assaults an alien stronghold that's too close to Mother Earth.

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  26. Spawn World

    Book 26 Out November 24, 2026 by B.V. Larson

    Legion Varus was promised a garrison rotation. Six months of easy duty on a quiet, compliant world where nobody has broken a rule in years. Halfway there, something clamps onto Scorpio's hull and drills a hole into her guts.

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About this reading order

Books are listed in the series' own numbering, which for Undying Mercenaries is also the best order to read them in. Years are first publication where we could confirm it, and otherwise the first audiobook release.

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