Expeditionary Force Books in Order
Expeditionary Force is a science fiction series by American author Craig Alanson, blending military sci-fi, space opera, and comedy; it follows U.S. Army soldier Joe Bishop and Skippy, a wisecracking ancient alien AI, after Earth is drawn into a galactic war. The first book, Columbus Day, was published in 2016, and the series (18 mainline entries plus a bridging novella) has continued through 2026 with Ground State.
Publication order
In the order the books were originally released.
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Buy on Amazon2016 · Craig Alanson
Columbus Day is a 2016 book by Craig Alanson. It is book 1 of the series Expeditionary Force.
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Buy on Amazon2016 · Craig Alanson
SpecOps is a 2016 book by Craig Alanson. It is book 2 of the series Expeditionary Force.
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Buy on Amazon2016 · Craig Alanson
Paradise is a 2016 book by Craig Alanson. It is book 3 of the series Expeditionary Force.
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Buy on Amazon2017 · Craig Alanson
Trouble on Paradise is a 2017 book by Craig Alanson. It is book 3 of the series Expeditionary Force.
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Buy on Amazon2017 · Craig Alanson
Black Ops is a 2017 book by Craig Alanson. It is book 4 of the series Expeditionary Force.
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2017 · Craig Alanson
Zero Hour is a 2017 book by Craig Alanson. It is book 5 of the series Expeditionary Force.
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Buy on Amazon2018 · Craig Alanson
Mavericks is a 2018 book by Craig Alanson. It is book 6 of the series Expeditionary Force.
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Buy on Amazon2019 · Craig Alanson
Renegades is a 2019 book by Craig Alanson. It is book 7 of the series Expeditionary Force.
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Buy on Amazon2019 · Craig Alanson
Armageddon is a 2019 book by Craig Alanson. It is book 8 of the series Expeditionary Force.
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Buy on Amazon2019 · Craig Alanson
Valkyrie is a 2019 book by Craig Alanson. It is book 9 of the series Expeditionary Force.
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Buy on Amazon2020 · Craig Alanson
Critical Mass is a 2020 book by Craig Alanson. It is book 10 of the series Expeditionary Force.
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Buy on Amazon2020 · Craig Alanson
Brushfire is a 2020 book by Craig Alanson. It is book 11 of the series Expeditionary Force.
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Buy on Amazon2021 · Craig Alanson
Breakaway is a 2021 book by Craig Alanson. It is book 12 of the series Expeditionary Force.
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Buy on Amazon2021 · Craig Alanson
Fallout is a 2021 book by Craig Alanson. It is book 13 of the series Expeditionary Force.
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Buy on Amazon2022 · Craig Alanson
Match Game is a 2022 book by Craig Alanson. It is book 14 of the series Expeditionary Force.
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Buy on Amazon2022 · Craig Alanson
Failure Mode is a 2022 book by Craig Alanson. It is book 15 of the series Expeditionary Force.
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Buy on Amazon2023 · Craig Alanson
Aftermath is a 2023 book by Craig Alanson. It is book 16 of the series Expeditionary Force.
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2024 · Craig Alanson
The Merry Band of Pirates stopped the enemy from stealing a Sentinel and destroyed its Elder starship, yet found no cause for celebration: the enemy…
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Buy on Amazon2025 · Craig Alanson
Gateway is a 2025 book by Craig Alanson. It is book 18 of the series Expeditionary Force.
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2026 · Craig Alanson
Ground State is a 2026 book by Craig Alanson. It is book 19 of the series Expeditionary Force.
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Frequently asked questions
What order should I read the Expeditionary Force books in?
Read them in publication order, starting with “Columbus Day”. Start with “Columbus Day.”
How many books are in the Expeditionary Force series?
We list 20 books by Craig Alanson , published between 2016–2026.
Where can I buy the Expeditionary Force books?
Each title above links to Amazon. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Reading order compiled from author/publisher guidance and verified bibliographic data. Spotted an error? We continuously correct the catalog.