Kathryn Harkup is a chemist with an expertise in poison. She’s made a close study of a famous poisoner that employed everything from arsenic to cyanide to knock off close to 300 (fictional) victims: Agatha Christie, the mystery writer.
Throughout history, we've been surrounded by substances that seemed benign and innocent in our food, in our gardens, in our medicine cabinets — until we realized they could be slowly killing us.
