This, the first volume of a series entitled La destinée et le probleme du vrai, may well be of greater interest to readers attracted by the more inclusive general title than to those who expect much from a specific study of l'esprit and le réel in terms of mathematical philosophy. Such a reference is indeed misleading, for mathematical certainties are eschewed in M. Maugé's metaphysics and the quest of Truth rather than limited truths is indicated as appropriate for philosophy. It is not, in spite of the title, Descartes the mathematician but Kant the transcendentalist who illuminates—some might say, overshadows the work. Even more, 'after twenty-seven years of meditative silence', the author is still in evident and avowed debt to Schelling; but the disciple seems to cling to a phase of his master's thought which Schelling felt himself to have amplified and supplemented in his later work.