Title: The Island of Adventure
First published: March 14, 1975
Description: For Philip, Dinah, Lucy-Ann, Jack and Kiki the parrot, the summer holidays in Cornwall are everything they'd hoped for. Until they begin to realize that something very sinister is taking place on the mysterious Isle of Gloom - where a dangerous adventure awaits them in the abandoned copper mines and secret tunnels beneath the sea.
Subjects: Children's stories, Islands, Juvenile fiction, Abandoned mines, Tunnels, Adventure and adventurers, Underwater tunnels, Fiction, Treasure troves, Adventure stories, Children's fiction, Adventure and adventurers, fiction, Children, Copper mines and mining, Fiction, action & adventure, Fiction, general