Horror writer Stephen King would so relish watching President Donald Trump debate his border wall with another critically acclaimed author that King offered in a tweet Saturday to pay $10,000 to see it happen.

King was responding to a tweet by Don Winslow, author of a new book coming out later this month called The Border. The book is the final offering of Winslow’s fictional trilogy on drug wars involving the Mexican cartels.

Winslow is something of an expert on the southern border, which he has researched extensively for his books. He says he has walked “every mile” of it. He believes that Trump’s wall comes from “cuckoo land” and that the president has concocted a “fictional emergency” stringing together a handful of real events to create a fake world of chaos and crime.