Selections from the notebooks of the distinguished philosopher discuss subjects such as music, religion, thinking, science, architecture, and civilization.

Zettel, an en face bilingual edition, collects fragments from Wittgenstein's work between 1929 and 1948 on issues of the mind, mathematics, and language.

Intellectual diary of a thinker of the school of Logical Positivism showing the day-by-day development of his philosophical ideas.