Existentialism: An Introduction - Hardcoverby Kevin Aho (Author) Existentialism: An Introduction provides an accessible and scholarly introduction to the core ideas of the existentialist tradition. Kevin Aho draws on a wide range of existentialist thinkers in chapters centering on the key themes of freedom, being in the world, alienation, nihilism, anxiety and authenticity. He also addresses important but often overlooked issues in the canon of existentialism, with discussions devoted to the