Book excerpt: "Wittgenstein in Vienna" documents Wittgenstein's life in the city: the places he, his family and those with whom he was in contact, lived, worked, entertained and socialized. The book will be a source of enrichment to the cultural tourist in Vienna. Its authors are authorities on Wittgenstein's philosophy especially in relation to Viennese culture and popular culture, in particular the world of the coffee house and cabaret.