Since Flynn wrote fifteen bestselling novels, this first movie could turn into a very lucrative project. Screen Crush describes the plot:
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Dylan O’Brien is a black ops assassin ready to handle the CIA’s most sensitive crimes. O’Brien stars as Mitch Rapp, a counterterrorism operative who has to stop a maniac from starting a third world war in American Assassin. The film is based on the first of a 15-book-long series by Vince Flynn, and if this one does well in theaters, we can expect a whole lot more, as this is the first in a planned franchise.
But O’Brien is not the only star: Michael Keaton plays Rapp’s Cold War veteran mentor, and Taylor Kitsch is the warmongering terrorist Rapp has to stop. Every single one of the books in the American Assassin series has been a New York Times bestseller, so we can expect a lot of buzz for the movie to start heating up once it’s done filming.