Chains of Command: Frontlines, Book 4 (Unabridged)
2016
Angles of Attack: Frontlines, Book 3 (Unabridged)
2015
Terms of Enlistment: Frontlines, Book 1 (Unabridged)
2014
Lines of Departure: Frontlines, Book 2 (Unabridged)
2014
Fields of Fire: Frontlines, Book 5 (Unabridged)
2017
Centers of Gravity: Frontlines, Book 8 (Unabridged)
2022