Trump has an MBA from Wharton. And I believe his father died long after Trump became successful and well-known. “The Art of the Deal” was published prior to his father’s death.
True, his father was in the construction business and Trump learned a lot from him, and he may (or may not) have had some financial assistance from his father starting out, but The Donald is one sharp cookie and his accomplishments, especially at such a young age (he was only 44 when “The Art of the Deal” was written) are truly astounding.