One of Trump's first biography novels of the 1980's was called "The Art of the Deal" which Trump often makes reference to even today.
Trump did not write that novel but instead hired a professional Writer to do that job. That Writer's name was Tony Schwartz.
In Tony's autobiography as it reflected on his writing of The Art of the Deal, Tony admits that he completely regrets writing that novel for Trump because he had agreed to lie through his teeth about Donald's keen business sense, in exchange for money from Trump.
He said "Donald J. Trump is a total fraud, he is incompetent in business matters, he is socially inept in any social circle he finds himself in and he suffers terribly from Attention Deficit Syndrome. Everything you've ever heard about Trump as a financial guru is what I manufactured with my imagination in his novel, The Art of the Deal and now I hate myself for lying to the world".
