Ferry de Medianoche = Night Ferry

At the start of the sharply plotted third thriller from Australian author Robotham (after Suspect and Lost), London police detective Alisha Barba, a Sikh woman who's recovering from a back injury incurred in the line of duty in Lost ("After six operations and nine months of physiotherapy I am fit again, with more steel in my spine than England's back four"), receives a brief note from a school friend, Cate, whom she hasn't heard from in eight years: "I'm in trouble. I must see you..