Five On A Treasure Island is the very first book in Enid Blyton's Famous Five series. The story introduces Julian, Dick, and Anne staying with their cousin George (Georgina) and her dog Timmy on the coast. They explore Kirrin Island, owned by George's family, where they discover a mysterious shipwreck and clues pointing to a hidden treasure. This foundational novel establishes the children's adventurous spirit, their enduring bond, and the classic formula of solving a mystery while on holiday.