In doing research on the Cold War in the Bodleian Library, the author discovers correspondence of Isaiah Berlin blocking Isaac Deutscher's appointment in 1963 to a chair in Soviet studies at the University of Sussex. Intrigued by this story of personal animus (and by his own personal memory of allusions Berlin had made at the time without noting the name of the institution), the author uses the feud as a path for exploring Berlin and Deutscher's differing views on a wide range of Cold War and other controversies relating to, among others, Trotsky, Stalin, Pasternak, the People’s Democracies, Israel, and the Vietnam War. The author not only draws the contrast between them but also separately analyzes and critiques their different views. The result is a series of fascinating and illuminating discussions of these complex topics. While the book is occasioned by the blockage of the appointment, the author is fair to Berlin, and indeed is willing to entertain extenuating circumstances with respect to it. Despite this, Berlin comes off poorly in this book-- on the one hand, many of his public pronouncements and writings on the Cold War topics under consideration come across as Cold War ideology and, on the other, his involvement behind the scenes involving not only Deutscher but also other matters (including, interestingly, Hannah Arendt’s Eichmann in Jerusalem) comes across as scheming. One surprising tidbit is that while serving in the British Embassy in Washington, Berlin leaked to the US Jewish community on one occasion confidential information concerning the UK’s policies on Israel. There are not as many insights into Deutscher’s private life (for one thing, there appears to be no biography comparable to Michael Ignatieff's of Berlin to draw on) but the author nevertheless provides an interesting narrative of his actions and writings. Deutscher had a much larger body of work on Soviet history and related issues than did Berlin. While rejecting Berlin's views on Deutscher's qualifications for an academic post, the author agrees with many criticisms of Deutscher's political and historical positions including his tendency to excuse Soviet actions and policies in the expectation that in the future the Soviet Union would eventually become a better socialist society. ( )