When Russia's Dowager Empress was pregnant with the future Tsar, she dreamed that a peasant would one day kill her son. The idea terrified her, and for the rest of her days she 'lived under the pressure of the prophecy'.

Rasputin had no official position. A barely literate moujhik from Siberia, he had no forces at his command. He was a devoted monarchist, not a revolutionary. And yet, through his uncanny seduction of the imperial household, he contributed more than any other individual to the collapse of the greatest autocracy in the world. 'This man was unique', observed one writer. 'Like a character out of a novel, he lived in legend, he died in legend, and his memory is cloaked in legend.'

In this extraordinary new work, Antony Beevor, master of narrative history on the grandest scale, sharpens his focus to pierce the fog of fantasy that has only grown denser over time. The result is an unparalleled portrait of one of history's most dubious masterminds.