The Lion, the Witch and the Wardrobe (Chronicles of Narnia, #1)

They open a door and enter a world.

NARNIA... the land beyond the wardrobe, the secret country known only to Peter, Susan, Edmund, and Lucy... the place where the adventure begins.

Lucy is the first to find the secret of the wardrobe in the professor's mysterious old house. At first, no one believes her when she tells of her adventures in the land of Narnia. But soon, Edmund, and then Peter and Susan, discover the magic and meet Aslan, the Great Lion, for themselves. In the blink of an eye, their lives are changed forever.