Which C.S. Lewis book features the lion Aslan and the White Witch?

The C.S. Lewis book featuring the lion Aslan and the White Witch is The Lion, the Witch and the Wardrobe.

Published in 1950, the novel introduces readers to Narnia through the experiences of Peter, Susan, Edmund, and Lucy Pevensie. Lucy discovers a passage through a wardrobe into the snowy wood of Narnia, where the White Witch has imposed a winter that seems to have no end.

Aslan, the great lion, is the central benevolent figure in the story. The White Witch, also called Jadis, rules Narnia as its principal antagonist. Edmund's betrayal and later repentance help drive the plot, while the four children become involved in the struggle to restore Narnia's rightful order.

The novel was the first Narnia book published, although Lewis's internal chronology places The Magician's Nephew earlier. That distinction accounts for different reading orders used by fans and publishers.