Heidegger's Being and Time is one of the most influential and controversial philosophical treatises of the 20th century. But what exactly are the ideas that so profoundly impacted Sartre's existentialism, influenced Gadamer's hermeneutics, and paved the way for the emergence of deconstruction? And what or who is 'Dasein'? Answering these questions and more, this guide is an essential resource for anyone wanting to get to grips with Heidegger's magnum opus. Updated with the latest scholarship, the new 2nd edition features:· Updated and increased engagement with the secondary literature on the treatise. · Expanded coverage to guide readers through both Division I and Division II, elucidating Heidegger's thinking on time, history, and space· References throughout to the leading English translations by Macquarrie and Robinson · Updated study questions linking complex philosophical concepts to everyday life and an extended glossary of key terms