In August 1939, Hetty Cartwright is tasked with taking a natural history museum’s collection of stuffed animals out of London, to protect it from impending air raids. When some of the animals go missing, and worse, Hetty begins to suspect someone – or something – is stalking her through the darkened corridors of the country house. Alice Roberts talks to author Jane Healey about her new novel, a gripping and atmospheric tale of family madness, long-buried secrets and hidden desires.