This is Not the End of the Book, By Umberto Eco and Jean-Claude Carrière

Contrary to the title, this is not a book in the conventional sense but a conversation on books between polymath and screenwriter that was "curated" by a third party.

The effect is like My Dinner with André. There is odd anecdote, Borgesian musing (UC: "My neighbour and I both own a copy of Hypnerotomachia Poliphili, possibly the most beautiful book in the world... I am of course referring to the first incunable edition of 1499") and some boasting (UE: "I have 50,000 books in my various homes").