by Ruth Ware
Reviewed by Janet:Before dinner the first night at sea on an exclusive luxury cruise, Lo Blacklock, a travel writer, borrows some mascara from the woman in the cabin next door. Later that night, Lo is awakened from an alcohol-enhanced sleep by a scream and a splash. Convinced that the woman in cabin 10 has been thrown overboard, Lo tries to convince a skeptical crew that there has been a murder. Once the story gets rolling, this one is hard to put down!