Because of the novelty of its content, the repercussions of its impact and its significance for posterity, the Tractatus Logico-Philosophicus is generally recognized as one of the most decisive philosophical works, but also as one of the most difficult to understand.

In the present text, Alejandro Tomasini Bassols faces the challenge of elucidating the content of Ludwig Wittgenstein's first book and offers us a coherent and convenient reconstruction of his most revealing positions. Thanks to it, it is now possible for the reader in Spanish to enter the text of Ludwig Wittgenstein without getting lost in the intricate sequence of thoughts that make it up.

The author of this introduction offers us in an orderly fashion what could be called the "logical interpretation" of the Tractatus, that is, the logical conception of reality, language, numbers, mysticism, etc., as well as the new conception of philosophy as logical clarification of thought.

The Wittgenstein that emerges from this reconstruction is that of an original, profound, genuinely enlightening and, above all, intelligible thinker. Hardly will be found in the literature in Spanish on the subject a comparable book that in so few pages help anyone who is interested in the philosophy of Wittgenstein to understand and enjoy the philosophical message contained in what was his first great book.