RE: The Whistleblowers (Series): #20 - Donald Trump's Biographer Comes Clean On Lying About Trump's Character For Money: "Trump Is A Habitual Liar, Has A Memory Of A Goldfish & Is Only Interested In His Own Image, In 'Winning' & Self Aggrandizement".

[ura-soul]

It's clear to me that he didn't want to ruin his career by exposing the situation, but when trump got close to being president he felt compelled to do something to try to change the dynamics of the situation since it was partially due to his writing that trump became so famous. in essence he appears to be acting out of fear for the future.