Who’s Really Writing Celebrity Novels?

Celebrity memoirs are a dime a dozen, but there's a smaller cohort of stars who have tried to add "novelist" to their résumés. This includes Kylie and Kendall Jenner, who wrote the 2014 YA novel Rebels: City of Indra; Carrie Fisher, author of the deeply autobiographical Postcards From the Edge; and Tyra Banks, whose 569-page Modelland is about a girl named Tookie De La Crème. In early October, Reese Witherspoon announced she was collaborating with the best-selling thriller author Harlan Coben. But what does it mean when a celebrity decides to write fiction?

Here, the writers and agents working behind the scenes on similar books tell us how it actually works.