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
Enid Blyton spin-offs and strip books were produced throughout the decade, including "Noddy's Library", "Noddy's Garage of Books", "Noddy's Castle of Books", "Noddy's Toy Station of Books" and "Noddy's Shop of Books". In 1950 Blyton established the company Darrell Waters Ltd to manage her affairs. By the early 1950s she had reached the peak of her output, often publishing more than fifty books a year, and she remained extremely prolific throughout much of the decade. By 1955 Blyton had written her fourteenth Famous Five novel, "Five Have Plenty of Fun", her fifteenth Mary Mouse book, "Mary Mouse in Nursery Rhyme Land", her