Reading Order List — Book Series Reading Order Guide

Thomas DePrima Reading Order

5 series · 21 books

Action & AdventureFantasyMystery & ThrillerNon-FictionScience Fiction

Thomas DePrima crafts expansive science fiction universes populated with complex characters navigating space exploration, military conflict, and investigative intrigue. Best known for his A Galaxy Unknown saga and its related series including Border Patrol and Space Command Intelligence, DePrima blends hard sci-fi worldbuilding with mystery and thriller elements to create immersive narratives. His prolific output across multiple series demonstrates a mastery of the space opera genre combined with influences drawn from crime drama and action-adventure storytelling.

A Galaxy Unknown Series

Complete

12 books (2008–2018)

Start with A Galaxy Unknown, the first of 12 books in the A Galaxy Unknown series.

Start this series with A Galaxy Unknown

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#Title
1
Cover of A Galaxy Unknown
A Galaxy Unknown
2008Buy 🇺🇸🎧 Audible
2
Cover of Milor!
3
Cover of The Clones of Mawcett
The Clones of Mawcett
2010Buy 🇺🇸🎧 Audible
4
Cover of Trader Vyx
5
Cover of Valor at Vauzlee
Valor at Vauzlee
2010Buy 🇺🇸🎧 Audible
6
Cover of Against All Odds
Against All Odds
2011Buy 🇺🇸🎧 Audible
7
Cover of Castle Vroman
Castle Vroman
2011Buy 🇺🇸🎧 Audible
8
Cover of Return to Dakistee
Return to Dakistee
2011Buy 🇺🇸🎧 Audible
9
Cover of Retreat And Adapt
Retreat And Adapt
2013Buy 🇺🇸🎧 Audible
10
Cover of Azula Carver
Azula Carver
2015Buy 🇺🇸🎧 Audible
11
Cover of Changing of the Guard
Changing of the Guard
2017Buy 🇺🇸🎧 Audible
12
The Invasion Begins
2018Buy 🇺🇸🎧 Audible

AGU: Border Patrol Series

Complete

4 books (2012–2019)

Start with Citizen X, the first of 4 books in the AGU: Border Patrol series.

Start this series with Citizen X

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#Title
1
Cover of Citizen X
2
Cover of Clidepp Requital
Clidepp Requital
2014Buy 🇺🇸🎧 Audible
3
Cover of Clidepp Deja Vu
Clidepp Deja Vu
2016Buy 🇺🇸🎧 Audible
4
Lieutenant Marcola
2019Buy 🇺🇸🎧 Audible

AGU: Space Command Intelligence Series

Complete

1 book (2013–2013)

#Title
1
The Star Brotherhood
2013Buy 🇺🇸🎧 Audible

Arlene Watson Series

Complete

2 books (2008–2016)

Start with When the Spirit Moves You and read in order.

Start this series with When the Spirit Moves You

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#Title
1
Cover of When the Spirit Moves You
When the Spirit Moves You
2008Buy 🇺🇸🎧 Audible
2
Cover of When the Spirit Calls
When the Spirit Calls
2016Buy 🇺🇸🎧 Audible

Colton James Series

Complete

2 books (2014–2016)

Start with A World Without Secrets and read in order.

Start this series with A World Without Secrets

Buy Book 1 🇺🇸🎧 Listen free on Audible
#Title
1
Cover of A World Without Secrets
A World Without Secrets
2014Buy 🇺🇸🎧 Audible
2
Cover of Vengeance is Personal
Vengeance is Personal
2016Buy 🇺🇸🎧 Audible

Frequently Asked Questions

How many books has Thomas DePrima written?
Thomas DePrima has written 21 books across 5 series. Their published works span from 2008 to 2019.
What is the first book in each Thomas DePrima series?
Here are the first books in Thomas DePrima's series: A Galaxy Unknown: A Galaxy Unknown; AGU: Border Patrol: Citizen X; Arlene Watson: When the Spirit Moves You; Colton James: A World Without Secrets.
What order should I read Thomas DePrima's books?
We recommend reading Thomas DePrima's series in publication order. Each series can be read independently.
Are Thomas DePrima's series complete?
Thomas DePrima has 5 completed series.

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