Two White Mice Under a Riding Whip

A drawing of two white mice. A riding whip. And a woman who cannot speak — but is trying, desperately, to tell someone something.
A barrister with a gift for codes. A psychologist who doesn't believe in telepathy — until tonight. And forty miles of dark country road between them and an old house with two white doors.
Some messages are written. Some are screamed in silence.
E.C.R. Lorac — a puzzle, a race against time, and a mother's last, wordless act of courage.