Ludwig Wittgenstein is one of the greatest and most fascinating philosophers of all time. His Tractatus Logico-Philosophicus, composed in a series of remarkable numbered propositions, was the only book he published in his lifetime. He tackles nothing less than the question of whether there is such a thing as a logically perfect language and, armed with it, what we can say about the nature of the world itself. Pushing the limits of language, logic and philosophy, the Tractatus is a brilliant, cryptic and hypnotic tour de force, exerting a major impact on twentieth-century philosophy and stirring the imagination today. With a new foreword by Ray Monk.