This textbook introduces you to existentialist philosophical theory and its cultural influence. The first part of the book offers an introductory overview of the 19th century historical roots of existentialist thought and chapters on all the key players: Kierkegaard, Nietzsche, Heidegger, Sartre, de Beauvoir, and Camus. The second part presents a thematic approach, with chapters on Christian and Jewish existentialism, existentialism in America, existential psychology and existentialism in the cinema. Ideal for undergraduate and classroom use, this engaging and accessible textbook includes pedagogical features, such as study questions, chapter summaries, key definitions and further reading.