Texas Guardians Series by Barb Han, Brotherhood Protectors World

Ex-Special Forces sniper turned Blackwater Agency Operative Jaden Dean takes what should be a glorified babysitting mission while nursing a bullet wound. He quickly realizes that things aren’t always as they seem when his assignment, Lauren James, cleans out her bank account and heads to a known drop spot in the Caribbean. Is she in deep with the criminal brother she supposedly barely knows?

For Gabriel Cooper, resurfacing might prove deadly. He needs to see for himself that one of his brothers in arms has survived. Gabriel risks his own safety for confirmation and maybe a little hope that there's life after Blackwater-type agency work. But when Kinsley Greer—a name from his past—shows up on a hitlist, he has to stay on the surface to keep her alive. He's determined to save her even though stepping out of the shadows brings him into the light.