Which C.S. Lewis book begins with a wardrobe leading to the world of Narnia?

The C.S. Lewis book that begins with a wardrobe leading to Narnia is The Lion, the Witch and the Wardrobe.

Published in 1950, it is the first Narnia book Lewis wrote and the best-known entry point into the series. The story follows Peter, Susan, Edmund, and Lucy Pevensie, who discover Narnia after Lucy enters a magical wardrobe in a country house.

The wardrobe itself is linked to the events of The Magician’s Nephew, which Lewis later wrote as a prequel. Because of that later publication, readers may encounter two different reading orders: publication order and the internal chronological order of Narnia’s history.

The title’s three central images point to major elements of the story: Aslan, the White Witch, and the enchanted forest world. The book became one of the most influential children’s fantasy novels of the twentieth century and has been adapted for stage, radio, television, and film.