Noted scholar Joseph S. Catalano here brings together his new work on Sartre's ethics with five of his classic essays on Sartre's moral thought. In an extended opening essay, Catalano uses Sartre's notion of mediation as a means to integrate the entire range of the French philosopher's moral insights. In the second half of the book, Catalano attempts to delineate a viable notion of good faith, and to distinguish between good and bad faith on the one hand and authenticity and inauthenticity on the other hand.