Hurrah! It’s holiday time, and the Famous Five are spending it at Billycock Hill. Most exciting of all, they’ve made a new friend – a real pilot! But now he has disappeared, with top secret equipment …The Five are puzzled, and concerned, too. Could their new friend by a spy – a traitor! Whatever his motives are, the gang feel duty-bound to investigate …These classic editions feature Enid Blyton’s unchanged text and Eileen A. Soper’s original illustrations.

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