The best selling middle grade fantasy series, Keeper of the Lost Cities, is becoming a movie! The 8 and a half book long novel series (and counting) is written by Shannon Messenger. The first book was published back in 2012! And now it’s going to be a live action movie on Disney Plus. The adaptation of the movie will be directed by Ben Affleck through this production company, Pearl Street Banner. He’s co-writing the script with Kate Gritmon, and Madison Aniley will be the executive producer.