Discussing the views of 19th and 20th century existentialists Kierkegaard, Nietzsche, Heidegger, and Sartre, the book has been translated into Persian by Elahe Hosseini. Tarh-e No Publishing has released 'Irrational Man' in 400 pages.

Widely recognized as the finest definition of existentialist philosophy ever written, this book introduced existentialism to America in 1958. Barrett speaks eloquently and directly to concerns of the 1990s: a period when the irrational and the absurd are no better integrated than before and when humankind is in even greater danger of destroying its existence without ever understanding the meaning of its existence.

'Irrational Man' begins by discussing the roots of existentialism in the art and thinking of Augustine, Aquinas, Pascal, Baudelaire, Blake, Dostoevski, Tolstoy, Hemingway, Picasso, Joyce, and Beckett. The heart of the book explains the views of the foremost existentialists—Kierkegaard, Nietzsche, Heidegger, and Sartre. The result is a marvelously lucid definition of existentialism and a brilliant

William Barrett was a professor of philosophy at New York University from 1950 to 1979, and later at Pace University.