Journalist Michael Wolff, who has written four books about President Donald Trump, revealed in an interview on Thursday that the lawsuit he filed against the First Lady could blow up in Trump's face.

Wolff sued First Lady Melania Trump on Wednesday, accusing her of trying to prevent him from reporting on her ties with disgraced financier Jeffrey Epstein. Melania Trump previously threatened Wolff with a $1 billion lawsuit because of claims he made during an episode of "The Daily Beast Podcast."

Wolff discussed the lawsuit on a new episode of "Inside Trump's Head," a podcast he co-hosts with The Daily Beast's Chief Content Officer Joanna Coles.

"We'll be looking to subpoena various Epstein documents," Wolff said. "That is another back door to begin to see materials from the so-called Epstein files."

Trump has fought tooth and nail to prevent the release of the Epstein files, even though he claimed during the campaign trail that he would release them once he was in office.

Instead, reports indicate Trump directed hundreds of FBI agents to comb through the files and remove any mention of his name. Trump has also sought to distance himself from Epstein, despite evidence showing they were close friends.

"Donald Trump and Jeffrey Epstein were the closest of friends for nearly 15 years," Wolff said. "Many of the conversations I had with Jeffrey Epstein were precisely about this, of Epstein talking about the real closeness, the intimacy of their relationship involved in every aspect of each other's lives, social lives, sexual lives, and business lives."

"I know the secrets," he continued.