The Stranger Diaries by Elly Griffiths Calvert Library's Book Bites for Adults

Clare Cassidy is no stranger to murder. A high school English teacher specializing in the Gothic writer R. M. Holland, she teaches a course on it every year. But when one of Clare's colleagues and closest friends is found dead, with a line from R. M. Holland's most famous story, "The Stranger," left by her body, Clare is horrified to see her life collide with the storylines of her favorite literature.