Something very sinister is happening on the mysterious Isle of Gloom and the children are determined to uncover the truth! But Philip, Dinah, Lucy-Ann and Jack are not prepared for the dangerous adventure that awaits them in the abandoned copper mines and secret tunnels beneath the sea.
Enid Blyton, who died in 1968, is one of the most successful children's authors of all time. She wrote over seven hundred books, which have been translated into more than 40 languages and have sold more than 400 million copies around the world. Enid Blyton's stories of magic, adventure and friendship continue to enchant children the world over. Enid Blyton's beloved works include The Famous Five, Malory Towers, The Magic Faraway Tree and the Adventure series.