Disney is in development on a film based on the bestselling book series Keeper of the Lost Cities by Shannon Messenger, with Ben Affleck attached to direct, Deadline reported, noting that there are more than 2.5 million books in print in the series. The most recent title, Unlocked, was released in November.
Affleck will also produce the film through his Pearl Street banner and adapt the script with Kate Gritmon. Madison Ainley is executive producing.