The best-selling biography of the greatest spy you’ve never heard of. A Suspicion of Spies is the first biography of ‘Biffy’ Dunderdale and tells the intriguing story of an extraordinary man – suave, sophisticated, genial and rich but also a ruthless and effective spymaster. Following his career, that spanned the Russian Revolution to the Cold War and beyond, A Suspicion of Spies is awash with stories of adventure, bravery, glamour and exoticism.