C. S. Lewis

"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."--Back cover.

When Digory and Polly try to return the wicked witch Jadis to her own world, the magic gets mixed up and they all land in Narnia where they witness Aslan blessing the animals with human speech.