What was the title of C.S. Lewis’s last non-Narnia novel?

C.S. Lewis’s last non-Narnia novel was Till We Have Faces: A Myth Retold. It was published in 1956 and retells the ancient myth of Cupid and Psyche.

The story is narrated by Orual, a princess and later queen of the fictional kingdom of Glome. Her account centers on her relationship with her half-sister Psyche and on the demands made by the god of the Grey Mountain. Lewis presents the myth through Orual’s perspective rather than through a conventional retelling from the gods’ viewpoint.

The novel is notable for its psychological depth and for its exploration of jealousy, love, identity, suffering, and self-knowledge. Lewis considered it one of his best works, but it has generally been less widely read than The Chronicles of Narnia or Mere Christianity.

The publication year creates a small trap: both Till We Have Faces and The Last Battle appeared in 1956. The former was Lewis’s final novel outside Narnia; the latter was his final Narnia novel and his last published fiction.