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.