Good question. I will look to see if there is more info. This is all I found. I guess it's a secret or private. "Trump signs on the front flyleaf in blue ink, adding a prescient inscription: "Future President". In very good to fine condition. The book is accompanied by a typed letter of provenance from the original recipient, in which he describes purchasing the book at a signing event at the Trump's Castle casino shortly after its release in November of 1987, and his request to Trump that he sign it as "Future President.”