A biographer of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE hit back at Trump’s tweet touting himself as the author of “many best selling books,” saying that ghostwriters had written all of the president’s books.

“President Trump didn’t write any of his books. Ghostwriters on all of them,” author Tim O’Brien tweeted Tuesday.

Another one of those tweets that sure seem staff-written.



Regardless: President Trump didn’t write any of his books. Ghostwriters on all of them. https://t.co/IuWekRDnJg — Tim O'Brien (@TimOBrien) July 3, 2018

O’Brien wrote the Trump biography “Trump Nation” and often appears in the media to discuss Trump.

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Trump is credited as the author of more than a dozen books. Almost all of them acknowledge the use of a ghostwriter or co-author.

The president defended himself over spelling errors in his tweets on Tuesday, saying that he has “written many best selling books” and “somewhat [prides] myself on my ability to write.”