I dont necessarily agree..
The Art of the Deal really isn't anything more than an Americanized version of classic Japanese negotiations.. he just adds a lot of bombastic, abrasive, Gordon Geckko type New Yorker to it all.. and people tend to focus more on his words, rather than his actions...
He also has a problem with speaking in a way that the message people hear, isn't the actual message he is sending... (an example "Mexico will pay for the wall"... people thought that meant Mexico would be writing a check and actually paying for the wall to be built on the border.... that's not at all what he was trying to say.. what Trump was saying was he'll take funding that otherwise was going to Mexico, and divert it to the wall if that's what needs to happen..)...
When he says "Ukraine started the war".. what everyone hears is the exact words he used.. and believes he means that Ukraine declared war, made the first act of aggression, etc..
What he thinks he is saying is Ukraine could have avoided the war by being better negotiators with the Russians, or by coming to the US in advance and being better negotiators, or by not trying to align itself with NATO and aggravating the Russians, etc..etc..
Dont get me wrong, Im not advocating for Trump.. He drives me freaking nuts most of the time.. Hes not a stupid man (you don't graduate from The Wharton School, build a multi-million dollar business into a multi-billion dollar business, etc.. as an idiot).. you'd think he'd learn, figure out how to speak in a way that actually communicates what he is trying to say, etc..
Thats where I think his ego becomes a problem.. I don't think he cares if you understand what he is trying to communicate.. or whether or not you think what he is doing is right or wrong.. he believes he has all the answers, and everyone else just needs to shut up and color..
but I don't think his negotiations tactics rely on others buying into his brilliance at all.. the rest of the worlds leaders have been calling him an idiot since 2016...
he negotiates from positions of power and leverage.. he firmly believes in "going big" or don't bother going at all (small negotiations arent worth his time or attention).. and exactly as he wrote in Art of the Deal, “The final key to the way I promote is bravado. I play to peoples fantasies”...
Nothing he is doing is new.. and nothing he is doing should be surprising to anyone.. he told everyone as far back as 1987 exactly how his mind works, why he operates the way he operates, and gave several examples of where he has applied his tactics and strategies effectively and ineffectively (Grand Hotel, Manhattan Convention Center, Trump Tower, USFL, etc..etc..)..
If I were Zelensky, Netanyahu, Putin, Rocket Man, Trudeau, or any other world leader that thinks they will have any cause to deal with Trump, I'd be reading Trumps book cover to cover a couple of times before we met.. he's told you exactly what he is going to do, how he's going to do it, and why he's going to do it.. and hasn't deviated from that methodology in literally 50 years..