David Greentree graduated in History at York before taking an MA in War Studies from King's College London and qualifying as a lecturer in Further Education. In 1995 he accepted a commission in the Royal Air Force and has served in a variety of locations, including Afghanistan and Oman. He has written several books for Osprey, focusing on British military history and World War II. He lives in Southsea, UK.

Mark Stacey was born in Manchester in 1964 and has been a freelance illustrator since 1987. He has a lifelong interest in all periods of history, particularly military history, and has specialized in this area throughout his career. He now lives and works in Cornwall, UK.

Peter Dennis was born in 1950. Inspired by contemporary magazines such as Look and Learn he studied Illustration at Liverpool Art College. Peter has since contributed to hundreds of books, predominantly on historical subjects, including many Osprey titles. A keen wargamer and modelmaker, he is based in Nottinghamshire, UK.

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