Ascendance (Dawnward #2)

Mitchell's sole ambition was a mundane job where he could spin in a chair and collect a paycheck, a cozy position that would maximize his talents of napping and eating all day. Never in his wildest nightmares would he have to travel through hostile a backcountry in search of an ominous assassin. Partnered with an arrogant, yet awe-inspiring super-soldier who finds his presence clumsy and cowardly, together they'll uncover a dark and ancient secret that will challenge everything they believe - if they can survive.