Five on a Treasure Island -- There was something else out on the sea by the rocks – something dark that seemed to lurch out of the waves … What could it be? Julian, Dick and Anne are spending the holidays with their tomboy cousin George and her dog, Timothy. One day, George takes them to explore nearby Kirrin Island, with its rocky little coast and old ruined castle on the top. Over on the island, they make a thrilling discovery, which leads them deep into the dungeons of Kirrin Castle on a dangerous adventure. Who – and what – will they find there? Five Go Adventuring Again -- In their second adventure, the Famous Five find a thief at Kirrin Cottage. They think they know who it is, but need to prove it. Will the discovery of a very old map help uncover the true culprit?