Which C.S. Lewis novel introduced the fictional land of Narnia?

The Lion, the Witch and the Wardrobe introduced C.S. Lewis’s fictional land of Narnia.

Published in 1950, the book is the first-published and best-known entry in The Chronicles of Narnia. It follows the Pevensie children—Peter, Susan, Edmund, and Lucy—after Lucy discovers a passage through a wardrobe into another world.

The story introduces major Narnian figures including Aslan, the White Witch, Mr. Tumnus, and the talking beavers. Its central conflict concerns the Witch’s winter rule and Aslan’s sacrifice and return.

Readers sometimes confuse publication order with the internal chronology of Narnia. The Magician’s Nephew is set earlier in Narnian history, but The Lion, the Witch and the Wardrobe was the first Narnia book Lewis published. It remains the usual entry point for readers and adaptations.