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.

Enid Blyton's much-loved classic series, packed full of adventure and mystery. Why are the locals so afraid of the deserted old castle on the hill? When lights are seen there in a distant tower, Philip, Dinah, Lucy-Ann and Jack decide to investigate - discovering a very sinister plot concelead in its gloomy rooms and secret passages. First published in 1946, this edition contains the original text and is unillustrated.

Nothing could be more exciting than a night flight on Bill’s plane! But Philip, Dinah, Lucy-Ann, and Jack soon find themselves flying straight into a truly amazing adventure. What has happened to Bill? Who are the two strange pilots, and what is the secret treasure hidden in the lonely valley where the children land?

Enid Blyton's much-loved classic series, packed full of adventure and mystery. A mysterious trip to the desolate northen isles leads to another exciting adventure for Philip, Dinah, Lucy-Ann and Jack. Bill is kidnapped, and the children are marooned far from the mainland. Will they rescue Bill in a dangerous game of hide-and-seek with an unknown enemy? First published in 1948, this edition contains the original text and is unillustrated.

The Mountain of Adventure

All aboard for a quiet cruise among the Greek Islands But when Philip's pet monkey breaks a birthday present, Philip, Dinah, Lucy-Ann and Jack are plunged into an exciting quest to find the lost treasure of the Andra - with some ruthless villains hot on their trail.

What on earth did Bill have to bring the wimpish Gustavus with them on holiday? Neither Jack nor Kiki the parrot like the boy at all. But when Gustavus is kidnapped, along with Philip, Dinah, and Lucy-Ann, Jack must bravely follow them to a faraway country and unravel a plot to kill the king.

A river cruise through ancient desert lands will be an adventure in itself, think Philip, Dinah, Lucy-Ann, and Jack. An adventure it certainly is, especially when Bill disappears and the children, along with Kiki the parrot, are trapped beneath a forgotten temple where no one has set foot for 7,000 years.

In The Island Of Adventure, Philip, Dinah, Lucy-Ann, Jack, and Kiki the parrot are plunged into danger when they investigate sinister happenings on the mysterious Isle of Gloom. What is the secret of the old castle on the hill, and why are the locals so afraid of it? The children are determined to find out in The Castle Of Adventure.

Two superb books in one from Enid Blyton's best-selling adventure series. Nothing could be more exciting than a night flight on Bill's plane. But in The Valley of Adventure, Philip, Dinah, Lucy-Ann, Jack, and Kiki the parrot fly straight into terrible danger. In The Sea of Adventure, the children find themselves marooned on a desolate coast, playing a dangerous game of hide-and-seek with an unknown enemy.