Trump has never written any of his own books and probably hasn't even read them. He's hired ghostwriters to do all of his books, including the bestselling Art of the Deal. The person who wrote that book for him spent several months hanging around him for interviews and information, and in 2016 he flatly stated in interviews that based on what he saw that Trump was in no way qualified to be president. And of course he was ignored.
I've posted this before, but Rufo is a dangerous dude. He seems to be a good deal smarter than many other GOP operatives, he's a good debater, and he routinely reads what liberals write about him and threatens to sue at the drop of a hat if he finds that any of their information about him is wrong, and he demands public apologies, which he then publicizes on his social media sites to show other conservatives how he's "sticking it to the libs." He's the guy who started the whole "Critical Race Theory being taught in schools" nonsense that led to the rise of Moms for Liberty and attacks on public ed.