The Wrong House — Elizabeth Cooke

Anna Miles has hidden from the world for months. But on a storm-lashed night, a stranger arrives at her door: a mute girl with the body of an old woman in her car. Who is the girl, and what is her strange connection to Anna? And from whom has Anna been hiding all this time? Chief Inspector Robert Wilde assumes the task of investigating the elderly passenger's death, a case which turns out to be the strangest and most disturbing of his career.