Nietzsche, philosophy and madness

I am Dynamite! A Life of Friedrich Nietzsche. By Sue Prideaux. Tim Duggan Books; 464 pages; $30. Faber & Faber; £25.

“GOD IS DEAD!…And we have killed him!” Nietzsche put his most famous words into the mouth of a madman in “The Gay Science”, a book published in his late 30s. A decade later his work began to find readers, but by then he had himself gone mad, and sometimes thought he was God.