Which C.S. Lewis fantasy series is set partly in Narnia?

The C.S. Lewis fantasy series set partly in Narnia is The Chronicles of Narnia.

The series consists of seven books published between 1950 and 1956. Narnia is a secondary world containing talking animals, mythical creatures, rulers, and a recurring conflict between good and evil. Several stories also connect Narnia with Earth through magical portals.

The best-known entry is The Lion, the Witch and the Wardrobe, in which four English children enter Narnia through a wardrobe. Other books explore the world’s creation, its later history, and its final destruction.

Readers often call the books a “series” while disagreeing about reading order. Publication order begins with The Lion, the Witch and the Wardrobe, whereas chronological lists begin with The Magician’s Nephew.