Cowboy in the Crosshairs by Nicole Helm

Can he get justice without getting them both killed?

After attempting to expose corruption in the highest ranks of the military and being unceremoniously discharged, former navy SEAL Nate Averly becomes an assassin’s target. Agent Elsie Rogers must protect him and uncover the threat before more lives are lost. But they’re up against a cunning adversary—and a cover-up that’s bigger and deadlier than they ever imagined…