A single spy can save thousands upon thousands of lives . . .

From Harry Ree, teacher turned saboteur, to Margery Booth, the spy who sang for Hitler, to Scotch Lass, Britain's smallest ever agent, discover twenty-seven of the most courageous and daring spies . . .

For as long as there have been secrets to keep, there have been spies, the world over, trying to uncover this classified information. Spying goes on all the time, and everywhere, but some of the most astonishing exploits occur during wartime.

The stories in this beautiful collection unpick some of the most astonishing missions undertaken during World War Two - actions that helped to save many lives. Amazingly, many of these tales had to remain a deadly secret at the time and are little known even to this day.

Discover twenty-seven of the most courageous and daring, including:

Giliana Gerson, Britain's first female spy,

Harry Ree, teacher turned saboteur,

Margery Booth, the spy who sang for Hitler,

Roald Dahl, the spy who became a bestselling author,

Noor Inayat Khan, the first woman wireless operator,

Scotch Lass, Britain's smallest ever agent,

'Major Martin' the man who never was

and many more!