This article stresses the importance of one of Sartre's often overlooked novels, The Age of Reason (1945), and the possibility that it should be considered an early attempt by Sartre to answer the questions he raises at the very end of Being and Nothingness (1943). Considered as a preliminary response to Being and Nothingness , this novel provides an opportunity to explore how ethics might be lived, and draws a clear distinction between a theoretical understanding of being-for-itself and living authentically. (...) As such, it is argued that Sartre's fictional writings, especially The Age of Reason , must be taken seriously in Sartre scholarship. (shrink)