Galaxy Unknown Books in Order
Thomas DePrima has written 17 Galaxy Unknown books, published between 2008 and 2019: 16 in the 2 main-line series and 1 related title. The first book is A Galaxy Unknown (2008) and the newest main-line book is Lieutenant Marcola (2019). Publication order is the reading order below.
- Books
- 17
- Published
- 2008–2019
- Pages on record
- 4,840 in 14 of 17 books
- Reading time
- 81–121 hours
Reading time is an estimate, not a recorded figure: 4,840 pages at 300 words a page, read at 200–300 words a minute, covering the 14 of 17 titles with a page count on record.
Galaxy Unknown is the entry for Thomas DePrima's space opera books, 17 in all, published from 2008 to 2019. Linked series are A Galaxy Unknown, AGU: Border Patrol and AGU: Space Command Intelligence, and space warfare is a recorded subject. A Galaxy Unknown (2008) is the first title. Milor!, The Clones of Mawcett, Trader Vyx and Valor at Vauzlee date from 2010, and Against All Odds, Castle Vroman and Return to Dakistee from 2011. Citizen X (2012) and Retreat And Adapt (2013) followed, and Lieutenant Marcola (2019) is the newest.
How many Galaxy Unknown books are there?
Galaxy Unknown has 17 books, released between 2008 and 2019. 16 of them belong to the 2 main-line series (A Galaxy Unknown, AGU: Border Patrol), and 1 related title sit outside it: other titles.
Galaxy Unknown Books in Publication Order
The table lists all 17 Galaxy Unknown books in the order they were published, with the release year, the page count where one is on record, and how many independent book listings confirm each title. Catalogue data as of September 2026.
- 120084262/4
- 22010–2/4
- 320104382/4
- 420103422/4
- 520103662/4
- 620113462/4
- 720113082/4
- 820113282/4
- 920123422/4
- 1020131862/4
- 112013–2/4
- 1220143522/4
- 1320153562/4
- 1420163422/4
- 1520173542/4
- 1620183542/4
- 172019–2/4
Do you have to read Galaxy Unknown books in order?
You should read the 2 main-line series in publication order, the order of the numbered table above; the 1 related title (other titles) sit outside that sequence. The catalogue does not record whether each Galaxy Unknown book also stands alone.
Where to start with Galaxy Unknown
Start with A Galaxy Unknown (2008), the earliest published book in the 2 main-line series.
What is the newest Galaxy Unknown book?
Lieutenant Marcola (2019) is the newest book in the 2 main-line series.
Is there a new Galaxy Unknown book coming?
No next Galaxy Unknown book is announced in the catalogue, which is a gap in the listings it merges rather than a sign that the run has ended.
Galaxy Unknown at a glance
- No recent titles
- The newest main-line Galaxy Unknown title on record is Lieutenant Marcola (2019), 7 years ago.
- Release pace
- Galaxy Unknown books have appeared more than one a year on average.
- Length
- 4,840 pages across the 14 of 17 books with a recorded length, a median of 349 pages each.
- Busiest decade
- Most Galaxy Unknown books, 16 of 17, were published in the 2010s.
What the Galaxy Unknown books are about
2 of the 17 Galaxy Unknown books carry subject tags in Open Library's catalogue. No subject is tagged on more than one of them, so each one below describes a single book. The subjects are cataloguers’ headings, not a plot summary.
- Guerre spatiale 1 of 2 books
- Romans, nouvelles 1 of 2 books
- Space opera 1 of 2 books
- Space warfare 1 of 2 books
More books by Thomas DePrima
The author page linked below lists every book in publication order.
- Thomas DePrima books in order 21 books
Series that include Galaxy Unknown books
The series linked below has its own reading-order page.
- A Galaxy Unknown books in order 12 books