This is perhaps as lucid and simple an explanation of a complex philosophy, and of its relations to other ideas, as one could hope for, but it is scarcely easy reading. Existentialism is a wide-ranging philosophy, variously related to psychology, the social sciences, religion, politics, etc. and its breadth makes it an interesting (and here heavily documented) subject of study. It is also, in its sense of man's freedom, as a being in a constant state of becoming , whose nature is determined by society but who freely chooses the goal he sets out to realize, and attractive and active philosophy. The chapter headings indicate the range of discussion: Sartre and Existentialism; Being and Nothingness; The Human Condition; Freedom as an Ethic; The Impossible God; Sartre and Catholic Man; Liberalism as Conservatism: The Modern Proteus; etc., etc. They also reveal the scope of the book from a description of the philosophy to its relations with other ideologies and religions, as well as some of Sartre's personal history. A good deal of technical language however makes this difficult though not impossible reading for the layman.