“The Art of the Deal” was written by Donald Trump and Tony Schwartz. It came out in 1989 when Trump was 43 years old. But even at 43, he was already known as the most enterprising millionaire ...

I read Donald Trump's 1987 book, "The Art of the Deal," to try to understand his tariff tactics. Several lessons and lines stood out to me, like his dismissal of traditional "number-crunchers." ...

I read Donald Trump's 1987 book, "The Art of the Deal," to try to understand his tariff tactics. Several lessons and lines stood out to me, like his dismissal of traditional "number-crunchers." ...

Donald Trump holds up a copy of his 1987 book, "The Art of the Deal" during a town hall event at Pinkerton Academy in Derry, New Hampshire, on August 19, 2015.

Mr. Schwartz was an author of “The Art of the Deal” and is the chief executive of The Energy Project. “The Apprentice,” a new movie that dramatizes the early years of Donald Trump’s ...