Tony Schwarz who ghost wrote "The Art of the Deal" about/for Trump in 1987 spoke out about the experience & his insights into Trump's patterns of behaviour:
New Yorker July 25 2016
(extract)
“Trump has been written about a thousand ways from Sunday, but this fundamental aspect of who he is doesn’t seem to be fully understood,” Schwartz told me. “It’s implicit in a lot of what people write, but it’s never explicit—or, at least, I haven’t seen it. And that is that it’s impossible to keep him focussed on any topic, other than his own self-aggrandizement, for more than a few minutes, and even then . . . ” Schwartz trailed off, shaking his head in amazement. He regards Trump’s inability to concentrate as alarming in a Presidential candidate. “If he had to be briefed on a crisis in the Situation Room, it’s impossible to imagine him paying attention over a long period of time,” he said.
In a recent phone interview, Trump told me that, to the contrary, he has the skill that matters most in a crisis: the ability to forge compromises. The reason he touted “The Art of the Deal” in his announcement, he explained, was that he believes that recent Presidents have lacked his toughness and finesse: “Look at the trade deficit with China. Look at the Iran deal. I’ve made a fortune by making deals. I do that. I do that well. That’s what I do.”
But Schwartz believes that Trump’s short attention span has left him with “a stunning level of superficial knowledge and plain ignorance.” He said, “That’s why he so prefers TV as his first news source—information comes in easily digestible sound bites.” He added, “I seriously doubt that Trump has ever read a book straight through in his adult life.” During the eighteen months that he observed Trump, Schwartz said, he never saw a book on Trump’s desk, or elsewhere in his office, or in his apartment."
This year, Schwartz has heard some argue that there must be a more thoughtful and nuanced version of Donald Trump that he is keeping in reserve for after the campaign. “There isn’t,” Schwartz insists. “There is no private Trump.” This is not a matter of hindsight. While working on “The Art of the Deal,” Schwartz kept a journal in which he expressed his amazement at Trump’s personality, writing that Trump seemed driven entirely by a need for public attention. “All he is is ‘stomp, stomp, stomp’—recognition from outside, bigger, more, a whole series of things that go nowhere in particular,” he observed, on October 21, 1986. But, as he noted in the journal a few days later, “the book will be far more successful if Trump is a sympathetic character—even weirdly sympathetic—than if he is just hateful or, worse yet, a one-dimensional blowhard.”
Schwartz says of Trump, “He lied strategically. He had a complete lack of conscience about it.” Since most people are “constrained by the truth,” Trump’s indifference to it “gave him a strange advantage.”
When challenged about the facts, Schwartz says, Trump would often double down, repeat himself, and grow belligerent. "
concludes:
As for Trump’s anger toward him, he said, “I don’t take it personally, because the truth is he didn’t mean it personally. People are dispensable and disposable in Trump’s world.” If Trump is elected President, he warned, “the millions of people who voted for him and believe that he represents their interests will learn what anyone who deals closely with him already knows—that he couldn’t care less about them.”
www.newyorker.com/magazine/2016/07/25/donald-trumps-ghostwriter-tells-all