An Undying Oath - The Oath Series, #1

Sergeant Justin Shaw returned from the war with what is left of his unit, though instead of being hailed as heroes, they are being sought as test subjects. Their last mission behind enemy lines to obtain a WMD ended with them exposed and on the run. Their goal is not only to destroy the weapon, but also the program being run by their own government. Justin and his men have sacrificed everything for their mission.
Will it be enough?Samantha James, a girl whose father disappeared almost twenty years ago unwittingly holds the key. When her father returns bodies start to fall. Sam doesn't know who to trust. Both Justin and her father have their own agendas and either one of them could end up with her dead.