This is a 1st edition copy published by Hodder & Stoughton in 1951. 

Biggles Works It Out propels readers into a high-octane world of post-WWI intrigue and adventure. Written by W.E. Johns, this gripping novel follows the intrepid pilot and detective, Squadron Leader Bigglesworth.

When a brilliant scientist disappears, leaving behind baffling clues, Biggles and his loyal team must unravel a web of espionage, secret societies, and imminent peril. As they navigate a treacherous landscape of mystery, time becomes their enemy.

With aerial acrobatics and clever strategies, Biggles races against the clock to thwart a catastrophe that could reshape Europe's destiny. Johns' vivid prose captures both the pulse-pounding action and the camaraderie of Biggles and his comrades.

"Biggles Works It Out" is a masterful blend of suspense, intellect, and historical ambiance that transports readers to a world where unraveling enigmas is the only path to survival.