Derived from 30,000 top-secret files of the KGB's Foreign Intelligence Service, The Mitrokhin Archive has sparked controversy in Whitehall and Fleet Street. It has also made Melita Norwood--Britain's grandmother-spy--an overnight media celebrity. This huge book is the result of a collaboration between Vasili Mitrokhin, a former senior officer of the Soviet Foreign Intelligence Service, and Christopher Andrew, Professor of Modern and Contemporary History and Chair of the Faculty of History at Cambridge University. Mitrokhin defected to the UK in 1992, bringing with him notes and classified files he had smuggled out of the Soviet foreign intelligence archives. The authors reveal that Norwood was more highly valued by the Soviets as a spy than the more famous Kim Philby. She passed on technical information that had enabled the Russians to build their own atomic bomb. As an employee at the British Non- Ferrous Metals Research Association, she passed on top- secret files on the Tube Alloys (atomic bomb) project. But Norwood was not alone in being approached to spy for the Soviets--others were MPs Tom Driberg and Raymond Fletcher. The book also records a misguided attempt at recruiting Sir Harold Wilson. The soviets may have been masters at collecting intelligence, but The Mitrokhin Archive shows their inability to interpret the information they received. It's an exhaustive but riveting read--and there's a promise of a second volume. --Susan Sheph.