1792: the blood begins to drip from the guillotine. The French Revolution is entering its most violent phase, and threatens all Europe with chaos. In the age of the mob, no individual is safe. The spies of England, France and Prussia are fighting their own war for survival and supremacy. Somewhere in Paris is a hidden trove of secrets that will reveal the treacheries of a whole continent.At the height of the madness a stranger arrives in Paris, to meet a man who has disappeared. Unknown and untrusted, he finds himself the centre of all conspiracy. When the world is changing forever, what must one man become to survive?Treason's Spring is a thrilling and meticulous panorama of Paris in the Revolution, the first of a trilogy of books whose revelations transform our understanding of an era.

From the secret archives of the Comptrollerate-General for Scrutiny and Survey. Summer 1914: Europe is on the brink. As Britain's enemies grow stronger, the Comptroller-General must confront the man with whom he has struggled for a generation - a man he knows only as the Spider. In a desperate gamble, he sends four agents out across the continent, on a mission they do not understand... The future of British intelligence - of the British Empire - is in their hands. Not all of them will return. Unique and resourceful, hunted and deceived, they have embarked on a journey that will climax in the town of Sarajevo on the 28th of June 1914.