Sungrazer

In a new Cold War between Earth and the colonies on Mars, when devastating weapons go missing, there's only one team you can call the Outriders. A crack force of highly specialised super-soldiers, their clone bodies are near-immortal. When a fully-autonomous vessel with orbital strike capabilities goes missing, it's up to the Outriders to track the untrackable. But when the trail leads them to the influential Martian People's Collective Republic, the operation gets a lot more complicated...