Boobbyer's book abounds with detail that animates philosophical positions that might otherwise seem unbearably abstract and dry. (British Journal for the History of Philsophy) Philip Boobbyer should be praised for providing such a wealth of new biographical information about Frank and for attempting to show how Frank's social and political ideas flow from his metaphysics. (Symposion, A Journal of Russian Thought) A first-rate piece of biography, Boobbyer's study deserves to be read by history and philosophy undergraduates and graduates alike. (Choice)