Book excerpt: Jacques Derrida is one of the most influential and controversial philosophers of the last fifty years. Derrida on Deconstruction introduces and assesses: Derrida's life and the background to his philosophy the key themes of the critique of metaphysics, language and ethics that characterize his most widely read works the continuing importance of Derrida's work to philosophy. This is a much-needed introduction for philosophy or humanities students undertaking courses on Derrida.