Matthew Vaughn’s latest spy adventure “Argylle” inches closer to its premiere, one important question remains unanswered: Who is Elly Conway? For those unfamiliar with “Argylle,” the film — starring Henry Cavill, Bryce Dallas Howard, Sam Rockwell, Dua Lipa and more — is said to be based on a book of the same name by Conway, an unknown, first-time author. Indeed, the book itself is real, published by Penguin and available for purchase. But in a twist revealed by the movie’s trailer, Conway is also the name of Howard’s character, a bestselling spy novelist who finds herself involved in some real-life espionage.