Also sprach Zarathustra: Ein Buch fur Alle und Keinen (Thus Spoke Zarathustra: A Book for All and None) is a philosophical novel by Friedrich Nietzsche, composed in four parts between 1883 and 1885. Hard to categorise, the work is a treatise on philosophy, a masterly work of literature, in parts a collection of poetry and in others a parody of and amendment to the Bible. Consisting largely of speeches by the book's hero, prophet Zarathustra, the work's content extends across a mass of styles and subject matter. Nietzsche himself described the work as "the deepest ever written." Due to the...