This is quite simply a masterful book. Ulam gives the impression of having read, pondered, and put in context everything ever written in any language by and about Stalin, the other Bolsheviks, and their close contemporaries in the USSR and Europe. And yet he is anything but tedious. He is as fine a writer as any historian around -- lucid, incisive, authoritative, serious and yet with a very witty, very dry irony. His tone is ideally suited for writing about historical figures, especially such grotesque ones as Stalin and his cohorts.