Apple TV+ released the trailer of third season of series Ghostwriter. The series is set to premiere on October 21. 

According to Apple TV+ statement, the synopsis of the series reads, "When a ghost haunts a bookstore and releases fictional characters into the real world, a group of friends works to solve an exciting mystery surrounding the ghost’s unfinished business. While tackling the big mystery, the young heroes embark on six curious adventures."

The series will have characters inspired by L Frank Baum's The Wonderful Wizard of Oz, author Pablo Cartaya's ¡Leo! El Magnífico, Beverly Cleary's The Mouse and the Motorcycle, Mick Jagger and Keith Richard's song She's A Rainbow, EB White's book Charlotte's Web, and Jewell Parker Rhodes' tale Bayou Magic.  The series stars Princess K Mapp, Nour Assaf, and Daire McLeod, along with guest stars Randall Park, Jay Baruchel, Jean Smart, among others. 

Ghostwriter is developed by JJ Johnson and Andrew Orenstein. Luke Matheny will helm five episodes.