Magic 13 Twins 13 Brothers and sisters 12 Characters in literature 12 Fairy tales 12 Youths' writings 12 Children's stories, English 2 Christians 1 Crimes against 1 Death 1 Demonology 1 Families 1 Fantasy fiction 1 Investigation 1 Murder 1 Serial murder investigation 1 Serial murderers 1 Sisters 1 Twin sisters 1 Witches 1