Description Whilst camping on Billycock Hill, the Famous Five, accompanied by Toby, a friend from a local farmhouse, encounter a mystery surrounding a Secret airfield nearby, and the mysterious disappearance of two planes. Toby’s Cousin: Jeff, who is a Flight-Lieutenant at the airfield is also missing, and it seems as if he and an accomplice have made off with the planes. Can the children clear his name and discover the true culprits?
