In book sixteen, it's holiday time at Billycock Hill and the Famous Five make new friend - a real pilot! But when he disappears with top secret equipment, the Five begin to wonder if their new friend could be a spy, or worse, a traitor.
Whatever his motives, the gang feel duty-bound to investigate...
Publisher,Hachette Children's Group Publication Date, Format, Paperback Weight, 290 g No. of Pages,