Have you read Irvin Yalom "When Nietzsche Wept"? A very powerful book psychologically adjusted. It seems, for it Irwin gave serious award.
Also the film was made http://www.imdb.com/title/tt0760188/
The story of how Nietzsche cured Dr. Breuer from existential depression.
My recommendations.
No I haven't so thanks for the recommendations. I'll check them out.