'The Black Book: Gog's New Diary') is a 1951 novel by the Italian writer Giovanni Papini.

It is in the form of a diary with the views and adventures of the American millionaire Goggins, nicknamed Gog.

[2] The book contains fictitious interviews with famous people including Adolf Hitler, Guglielmo Marconi, Frank Lloyd Wright, Salvador Dalí and Pablo Picasso.

In this comment, Picasso says: "When I am alone with myself, I have not the courage to think of myself as an artist in the great and ancient sense of the term.

Giotto, Titian, Rembrandt and Goya were great painters; I am only a public entertainer who has understood his times and has exhausted as best he could the imbecility, the vanity, the cupidity of his contemporaries.