In May 1941, the Norwegian Section of SOE received a dossier warning of the dangers of a hydroelectric fertiliser plant in Norway. Vemork produced heavy water, an essential part of making plutonium for nuclear weapons. When the Germans overran Norway the entire stock had been smuggled out of the country, but the plant was intact and soon producing heavy water again, destined for the German nuclear programme.

Despite the difficulties of getting to and operating in such a remote, hostile area, SOE decided it had to destroy the plant. Six ski-borne commandos had the task of slipping past 300 heavily armed guards and passing through a ravine the Germans thought impassable.

Fully illustrated with stunning, specially-commissioned artwork, this is the thrilling story of the daring Norwegian-led SOE raid that prevented Hitler from building an atomic bomb.