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Fortress Defense Books in Order
Below you'll find the complete list of Fortress Defense books in publication order. This is generally the recommended reading order for the series.
Reading order verified: April 2026
Quick Answer
What order should I read the Fortress Defense series? Start with "Deadly Cover-Up" (2019) and follow publication order through all 4 books.
The complete Fortress Defense reading order is listed below in publication sequence.
Publication Order
Deadly Cover-Up
2019
Missing in the Mountains
2020
Marine Protector
2020
Dangerous Knowledge
2020
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