Which C.S. Lewis novel tells of Narnia’s creation and introduces Digory Kirke?

The Magician’s Nephew tells of Narnia’s creation and introduces Digory Kirke.

Published in 1955, the novel follows Digory and Polly Plummer as they travel between worlds using enchanted rings made by Digory’s uncle, Andrew Ketterley. Their journeys bring them to the dying world of Charn, where Digory accidentally awakens Jadis, who later becomes the White Witch of Narnia.

The book’s central creation scene describes Aslan singing Narnia into existence. It also explains the origin of the wardrobe that later serves as the doorway in The Lion, the Witch and the Wardrobe. The adult Professor Kirke in that earlier novel is the same character as Digory.

The Magician’s Nephew was the sixth Narnia book published, but its setting makes it the first story in the internal chronology commonly used by readers. That difference between publication order and story chronology is one of the series’ most discussed features.