Five Ways To Surrender by Elle James

Their mission was clear: do not engage! But when his SEAL team is ambushed, "Big Jake" Schuler sacrifices his safety to draw the terrorists away from his unit. When village missionary teacher Alexandria Parker runs right into Jake's arms, they must hide together in the wild hills of Niger, causing Jake to discover that Alex is as tough as she is beautiful. This mission he'll engage with feelings he thought he buried a lifetime ago.

Delta Force Daddy by Carol Ericson

Amnesia has robbed Asher Knight of his memories of a fatal mission. Now, he doesn't recognise Paige Sterling, the woman who claims to be his fiancee. Does the Delta Force Lieutenant have PTSD - or something more sinister? On the run, he must rely on Paige to dodge unknown assassins and help him regain his memory...but is the secret she keeps from him even more shocking?