We know a lot about Donald Trump these days. He wants to build a wall between the U.S. and Mexico. He likes long walks on the beach and 3 a.m. Twitter rants. He has five children (but Ivanka is his favorite). In the insanity that has become the presidential race, it may seem that Trump is an open book with no more secrets to hide.

But there are a few, and authors Brandon Wetherbee and Chris Kelly have discovered a juicy one. For more than 25 years, Donald Trump has been deeply involved in the world of pro wrestling, and even holds a place in the WWE Hall of Fame. He didn’t wrestle himself, but he hosted multiple WrestleManias and is close friends with the WWE CEO. In their book The Donald: How Trump Turned Presidential Politics into Pro Wrestling, Wetherbee and Kelly explore the candidate’s connection to wrestling and how it has influenced his tactics in the election.

“I don’t think Trump is the nominee without a background in entertainment, specifically pro wrestling. And while it’s easy to dismiss the WWE as low culture, it is a billion dollar industry that appeals to both sides of the aisle,” Wetherbee told FamousDC. “Trump is able to navigate the business world and the world of sports entertainment better than anyone. We wanted to find out why and how.”

“After watching hours of old WrestleManias – basically the Super Bowl of pro wrestling – we realized how deep Donald Trump’s connection was with the WWE and its CEO, Vince McMahon,” Kelly told FamousDC. “Then, we scoured hours of old wrestling programs and old newspapers and books to craft a joint biography of the two billionaires, before finding wrestling analogues for all of Trump’s political positions and pronouncements.”

If you’re interested in this unique angle on Trump, the authors will be hosting a book release and debate watch party at the Black Cat on Sunday at 8 p.m. More info can be found here.