The Secret Seven short story titled "The Secret of the Old Mill". It followed an earlier short story, "At Seaside Cottage", which introduced the leading characters Peter and Janet prior to the formation of the society. There followed a further five short stories and fifteen full-length books. The Secret Seven appeared in seven short stories by Blyton, including a mini-novella explaining how the society was formed. These were left uncollected until 1997, when all but "At Seaside Cottage" were published in a single volume by Hodder Children's Books under the title of "Secret Seven: Short Story Collection". Scamper – Janet and Peter's pet
Secret passage murder seems "impossible". In Wells' stories, the solution to the seemingly impossible crime plots tend to depend on the murderers' use of secret passageways, secret panels, and hidden doors. Passages figure in several books of the "Famous Five" series written by Enid Blyton. Many of the supposedly haunted locations the main characters explore in the "Scooby-Doo" children's cartoon franchise have secret passageways, tunnels, and halls. Various secret passages have been depicted in Batman fiction, usually one between Wayne Manor and The Batcave and another for the Batmobile to enter/exit the Batcave. In the Harry Potter series by J.K. Rowling, the