We first reported on this project back in October, when Mark Gordon signed on to produce and develop this adaptation of C.S. Lewis' novel. Here's what the screenwriter had to say about the project in a statement.
"I have always loved The Chronicles of Narnia and I endlessly imagined myself finding my own passage into Narnia someday. All these years later, I'm getting to fulfill that wish just a little bit by writing the film adaptation of The Silver Chair and could not be more excited about it."
Mark Gordon is producing alongside C.S. Lewis' stepson Douglas Gresham and Vincent Sieber. The first three installments of this franchise, The Chronicles of Narnia: The Lion, The Witch and The Wardrobe, The Chronicles of Narnia: Prince Caspian and The Chronicles of Narnia: The Voyage of The Dawn Treader, have earned a combined $1.6 billion worldwide.
Here's an official description of the novel from the author's official website.
"Through dangers untold and caverns deep and dark, a noble band of friends is sent to rescue a prince held captive. But their mission to Underland brings them face-to-face with an evil more beautiful and more deadly than they ever expected."