Ratings13
Average rating3.7
For Philip, Dinah, Lucy-Ann and Jack, the holiday in Cornwall is everything they'd hope for - until they begin to realize that something very sinister is taking place on the mysterious Isle of Gloom.
But they're not prepared for the dangerous adventure that awaits them in the abandoned copper mines and secret tunnels beneath the sea.
Featured Series
6 primary books7 released booksAdventure is a 7-book series with 7 released primary works first released in 1944 with contributions by Enid Blyton and Penny Reeve.
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