The Mystery of No. 13 is a novel written by Helen Buckingham Mathers and published in 1891. The story revolves around a mysterious and sinister house, No. 13, which is said to be cursed and haunted. The protagonist, a young woman named Mollie, moves into No. 13 with her aunt and uncle, and soon strange and frightening things begin to happen. Mollie is convinced that the house is alive and that it is trying to harm her and her family. As she investigates...