Columbus Day
2016
Ground State: Expeditionary Force, Book 19 (Unabridged)
2026
Brushfire: Expeditionary Force, Book 11 (Unabridged)
2020
Critical Mass: Expeditionary Force, Book 10 (Unabridged)
2020
Valkyrie: Expeditionary Force, Book 9 (Unabridged)
2020
Armageddon: Expeditionary Force, Book 8 (Unabridged)
2019