In this volume: Biggles Sweeps The Desert: Something or someone is interfering with the vital British air supply route between West Africa and Egypt. Aircraft have been disappearing with no explanation. Biggles and his squadron are sent to investigate. Biggles In The Orient: Biggles and his squadron are urgently summoned to India to deal with a mystery. One by one, aircraft carrying vitally needed war supplies to China are disappearing on the India to China supply route - but no one knows how or why. There is even talk that the Japanese have invented a death ray... Biggles Delivers The Goods: An old acquaintance, Li Chi, has an interesting proposition for the British government. He has a built up a secret cache of rubber, a vital war material, and there is the prospect of more. The British government can have it if they will go and fetch it. The only problem: it is on a remote island in the Mergui archipelago, more than a thousand miles from the nearest allied air base and behind Japanese lines. Biggles 'Fails To Return': Biggles is sent on a secret mission to Monaco to fetch an Italian princess but fails to return. Algy, Ginger and Bertie get permission from Air Commodore Raymond to go in search of him.