(First Collier Books Edition, 1970) the Silver Chair Paperback By C.S. Lewis, Book 4 From the Chronicles of Narnia

How captive Prince Rilian escaped from the Emerald Witch's underground kingdom! From the back cover: "Here is your passport to a most extraordinary excursion into magical lands and enchanted happenings. If you've never been to Narnia, you can enter it for the first time with any of these books -- but once you start, you'll want to read every one of the Chronicles of Narnia!"