Which C.S. Lewis novel introduces the origin of Narnia?

The Magician’s Nephew introduces the origin of Narnia in C.S. Lewis’s fictional chronology. Published in 1955, it shows the creation of Narnia by Aslan and explains how the wardrobe’s magical connection to Earth began.

The story follows Digory Kirke and Polly Plummer, who travel between worlds using magical rings created through Digory’s uncle Andrew’s experiments. Their journey brings them to the dying world of Charn and then to the newly created Narnia.

Although it is the sixth Narnia book by publication date, The Magician’s Nephew is usually described as the first chronologically. The distinction between publication order and internal chronology is the source of many reading-order discussions.

The novel also connects with The Lion, the Witch and the Wardrobe through the wardrobe’s wood and the lamp-post in Narnia. Digory later appears as the elderly Professor Kirke in the earlier-published novel.