Is there a 4 Chronicles of Narnia?

There are seven books in the Chronicles of Narnia:

"The Magician's Nephew"

"The Lion, the Witch, and the Wardrobe"

"The Horse and His Boy"

"Prince Caspian"

"The Voyage of the Dawn Treader"

"The Silver Chair"

and "The Last Battle"

So far, they have only made "The Lion, the Witch, and the Wardrobe" and "Prince Caspian" into a movie. They are currently working on "The Voyage of the Dawn Treader" and will be released in 2011.

"The Silver Chair" is being made too. But it won't be out for another couple years.