Which C.S. Lewis book introduces the land of Narnia through a wardrobe?

The C.S. Lewis book that introduces Narnia through a wardrobe is The Lion, the Witch and the Wardrobe.

Published in 1950, the novel follows Peter, Susan, Edmund, and Lucy Pevensie after Lucy discovers a passage from a country house into Narnia. The wardrobe serves as the story’s doorway between the familiar human world and a fantasy realm experiencing an endless winter under the White Witch.

The book features Aslan, the great lion and central Narnian figure, as well as the children’s first major conflict with the Witch. Lewis drew on Christian imagery, folklore, fairy-tale patterns, and classical mythology, but the story is also a self-contained adventure for younger readers.

Although it is the first Narnia book many readers encounter, publication order and the series’ internal chronology are sometimes discussed separately. Lewis originally published this novel first, and its wardrobe portal remains the defining image associated with the series.