She's Missing - Missing Series, #2

When an intelligence agent's old partner goes missing, he puts his life on the line to find her. Coop hadn't spoken to his old partner, Zoe, since she abruptly left the Agency two years earlier. Out of the blue he receives a frantic phone call from her domestic partner, saying while on holiday in Cyprus, Zoe has disappeared. Coop promised his wife and son he would never return to the clandestine world of a field agent, but he has a gut feeling Zoe's life is in danger.
He breaks his promise and heads off to the Middle East, unaware that very soon his own life will also be in jeopardy.