Gunlords: The Sapphire King

It began as a routine mission: transport a handful of prisoners to a secure location. But when their transport vehicle breaks down in the middle of nowhere, Bravo Company's simple detail turns into a tour from Hell and a struggle to survive against a mysterious force greater then anything they have ever encountered in combat, a force that has mistaken them as the enemy! Now their fate lies in the hands of one of their prisoners--A Gunlord's son--whose extraordinary skills may be the only chance any of them have.