The box set includes the following 3 titles :
1.) The Island Of Adventure
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.
2.) The Castle Of Adventure
Why is everyone so afraid of the castle on the hill, and what dark secrets lurk inside its walls? When flashing lights are seen in a distant tower, Philip, Dinah, Lucy-Ann and Jack decide to investigate - and discover a very sinister plot concealed within its hidden rooms and gloomy underground passages.
3.) The Valley Of Adventure
Who are the two strange pilots, and what is the secret treasure hidden in the lonely valley where the children land? Nothing could be more exciting than a daring night flight on Bill's plane! But Philip, Dinah, Lucy-Ann and Jack soon find themselves flying straight into a truly amazing adventure.