Reg Whitaker, a professor of Political Science at York University in Toronto, gave a review at the "Intelligence Forum" about the book where he wrote that "The Mitrokhin Archive arrives from a cache under a Russian dacha floor, courtesy of the British intelligence community itself, and its chosen historian, Chris Andrew" and that the book "is remarkably restrained and reasonable in its handling of Westerners targeted by the KGB as agents or sources. The individuals outed by Mitrokhin appear to be what he says they were, but great care is generally taken to identify those who were unwitting dupes or, in many instances, uncooperative targets.