In this major work, leading theorist Samuel Weber provides a much-needed introduction to the thought of Jacques Lacan. Professor Weber approaches his subject from a dual perspective: he reads Lacan in the light of Freud (whose work Lacan is concerned to interpret), and from the perspective of structuralism, above all Saussure, from whom Lacan borrows and develops a distinctive conception of language as 'signifier'. Lacan is shown to contribute crucially to the rethinking of subjectivity that marks much of contemporary literary theory, and his 'return to Freud' - the complex relationship between his work and its Freudian antecedents - is explored extensively. The result, made available here for the first time in English (in a form thoroughly revised, updated, and augmented by the author) is a constantly illuminating work of intellectual enquiry, with important implications for our age.