Faithful. Sentinel Security

Guard Your Heart - Trust No OneUntil his last mission, British military medic Luke McLaren kept his oath, 'Do No Harm', but when he fails to save his best friend, Mike, his life implodes. Raw from her loss, midwife Kate Gibson, Mike's sister, doesn't believe in happy endings. Consumed with guilt Luke visits Kate to offer his apologies. With both of them reeling with grief, one night of make-me-forget sex, doesn't seem like a bad idea.
Life goes on. After leaving the military, Luke joins Sentinel Security, and Kate returns to her work in Africa. A year later, when Kate asks for Luke's help to expose a bomb threat, he agrees. He has no choice, thanks to his deathbed promise to Mike to protect her. With their hotter than hell connection reignited, Luke and Kate must face their personal demons as well as the enemy if they are to survive and claim a future together.