Mask of Treachery Author:John Costello The amazing exploits of the Soviet Cambridge spy ring have been extensively written about since Anthony Blunt, the queen's art advisor, was unmasked in 1979. British historian Costello provides a fascinating, massively researched portrait of the Soviet moles. His conclusions must be viewed cautiously, however, since most British sec... more »rets are still classified and since "a wilderness of mirrors" confronts anyone attempting to undo these labyrinths. More sweeping in his conclusions than Peter Wright's Spycatcher, Costello sees Blunt as the "first man" in the Cambridge ring, and the highly placed Guy Laddelle as the Soviet's "grandfather mole."« less