The Thermopylae Protocol (Gordian Division) Other Books in This Series

The Gordian Protocol: The Gordian Protocol, Book 1 (Unabridged)

2019

The Valkyrie Protocol: The Gordian Protocol, Book 2 (Unabridged)

2021

The Janus File (Gordian Division)

2024

The Weltall File (Gordian Division)

2024

The Dyson File (Gordian Division)

2025