Tractatus Logico-philosophicus (Unabridged‪)‬

The Tractatus Logico-Philosophicus is the only book published by Ludwig Wittgenstein. Any summary would frankly do the work an injustice - the interested reader is directed to Wittgenstein's preface and to the introduction of Wittgenstein's teacher, Bertrand Russell - upon these no author could measurably improve.