Fifty-one years after the philosopher Friedrich Nietzsche died, My Sister and I appeared on the American market as a book that was reputedly written by him when he was an inmate in the Jena insane asylum. Since the day it appeared, the book's authenticity has been generally dismissed as a fraud. Walter Stewart takes a fresh look at this book in what is the first detailed account of the myth, legend, and scholarly criticism that has shrouded this work in mystery for over half a century and for the first time unveils the real truth about My Sister and I.