Which 1950 C.S. Lewis book begins The Chronicles of Narnia in publication order?

The Lion, the Witch and the Wardrobe begins The Chronicles of Narnia in publication order. C.S. Lewis’s fantasy novel was published in 1950 and introduced readers to Narnia through the four Pevensie children: Peter, Susan, Edmund, and Lucy.

The story follows Lucy’s discovery of a doorway in a wardrobe leading to Narnia. There she meets the faun Mr. Tumnus and later encounters the White Witch and Aslan. The book became the best-known entry in the series and has been adapted for radio, television, stage, and film.

The publication order differs from the internal chronological order later used in some editions. The Magician’s Nephew describes events occurring earlier in Narnian history, but it was published sixth. Thus, “first” in this question means first published, not first in the fictional timeline.