The Lazarus War. Book 1, Artefact

Artefact is book one of the Lazarus War, an explosive new space adventure series of elite space marines, thrilling space battles and competing galactic empires - a stunning debut from a bright new star in science fiction. Mankind has spread to the stars, only to become locked in warfare with an insidious alien race. All that stands against the alien menace are the soldiers of the Simulant Operation Programme, an elite military team remotely operating avatars in the most dangerous theatres of war.
Captain Conrad Harris has died hundreds of times - running suicide missions in simulant bodies. Known as Lazarus, he is a man addicted to death. So when a secret research station deep in alien territory suddenly goes dark, there is no other man who could possibly lead a rescue mission. But Harris hasn't been trained for what he's about to find. And this time, he may not be coming back...'Hyper-speed entertainment from a new master of science fiction' William C.
Dietz'An adrenaline shot of rip-roaring military SF' Stephen Deas'Gripping, gritty and unsentimental - Sawyer shows us how perilous future war can be' Michael Cobley'Alien biomechs .