Peter James: Biggles - The Untold Story (UK 1986)

From the Publisher:
'BANDITS AT FOUR O'CLOCK!' yelled Biggles, 'IT'S VON STALHEIN HIMSELF! GET ON THAT GUN LADDIE!'
Jim Ferguson could hardly believe his eyes. One minute he'd been in his apartment in New York, the very next he was crouched in the rear cockpit of an ancient biplane, with all hell breaking loose around him. Was it a hideous nightmare? Or had he really landed slap-bang in the middle of the First World War?

Jim's worst fears were soon confirmed when the mysterious Colonel Raymond explained that he'd been caught in a time warp, doomed with Biggles to travel back and forth between 1985 and 1917. There was only one way out. Somehow they had to prevent the Germans using the deadly new secret weapon that could win the war in weeks - and change the entire course of history.

But first they had to outwit Biggles's arch-enemy, the legendary fighter ace Erich von Stalhein...

Peter James: Biggles - The Untold Story. The Storybook. London: Pan Piccolo Books, 1986, ISBN: 0330291610, 47 p., £2.95.