Good Old Secret Seven is the twelfth book in Enid Blyton's junior detective series. The Secret Seven—Peter, Janet, Jack, Barbara, Pam, Colin, and George—are determined to prove their usefulness during the holidays. They stumble upon a genuine mystery, likely involving a suspicious person, a theft, or strange goings-on at a local property. The story involves the children gathering in their shed, discussing clues, and using their combined efforts and passwords to solve the puzzle, reaffirming their dedication to their secret society.
