Safranski Rüdiger. Nietzsche, A Philosophical Biography, trans. Shelley Frisch. Norton, 2003.

Schaberg William H. The Nietzsche Canon, A Publication History and Bibliography. University of Chicago Press, 1995.

Schain Richard. The Legend of Nietzsche’s Syphilis. Greenwood Press, 2001.

Sherratt Yvonne. Hitler’s Philosophers. Yale University Press, 2013.

Small Robin. Nietzsche and Rée, A Star Friendship. Clarendon Press, Oxford, 2007.

Spencer Stewart and Millington Barry (eds.). Selected Letters of Richard Wagner. Dent, 1987.

Storer Colin. A Short History of the Weimar Republic. I. B. Tauris, 2013.

Tanner Michael. Nietzsche, A Very Short Introduction. Oxford University Press, 2000.

Vickers Julia. Lou von Salomé, A Biography of the Woman Who Inspired Freud, Nietzsche and Rilke. McFarland, 2008.