Before the Poison is a mystery novel written by Peter Robinson. The book takes place in Kilnsgate House, a beautiful house located in the dale. The protagonist, Chris Lowndes, moves to the house and becomes fascinated with its history, particularly the story of Grace Elizabeth Fox, who was executed for murdering her husband. As Chris delves deeper into the story, he becomes increasingly drawn into the mystery surrounding Grace's case and the events that led up to her execution. The book is a gripping tale of suspense and intrigue, with unexpected twists and turns that will keep readers on the edge of their seats until the very end.