In this book the web's controversial status as a corpus is investigated on both theoretical and applicative grounds. While the notion of a linguistic corpus as a body of texts rests on some related issues such as finite size, balance, permanence, the very idea of a web of texts brings about notions of non-finiteness, flexibility, provisionality. It is against this background that the book revisits key issues in corpus linguistics from the perspective of the web and explores the new issues that the emerging notion of the web as corpus possibly raises.