The book was tied quickly to controversial publisher Samuel Roth, the putative owner of Seven Sirens, who had spent jail time for the unlawful distribution of a version of James Joyce's Ulysses (1922). Along with Nietzsche's authorship attribution, the translation from German was credited to noted early Nietzsche scholar Oscar Levy. My Sister and I was first published in 1951 by Boar's Head Books and distributed by Seven Sirens Press in New York City. It is written in a style that combines anecdote and aphorism in a manner similar to other Nietzsche works. My Sister and I makes several bold and otherwise unreported biographical claims, most notably of an incestuous relationship between Nietzsche and his sister Elisabeth Förster-Nietzsche, as well as an affair with Richard Wagner's wife Cosima. If legitimate, My Sister and I would be Nietzsche's second autobiographical and final overall work, chronologically following his Wahnbriefe ( Madness Letters), written during his extended time of mental collapse.

It was supposedly written in 1889 or early 1890 during Nietzsche's stay in a mental asylum in the Thuringian city of Jena.

Following the Nietzsche scholar Walter Kaufmann, most consider the work to be a literary forgery, although a small minority argues for the book's authenticity. My Sister and I is an apocryphal work attributed to the German philosopher Friedrich Nietzsche.

Nietzsche by Walter Kaufmann