The Silver Chair was written by C.S. Lewis and published in 1953.
The Silver Chair
Narnia...where giants wreak havoc...where evil weaves a spell...where enchantment rules. Through dangers untold and caverns deep and dark, a noble band of friends are 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.