Which C.S. Lewis novel was his final work of fiction?

Till We Have Faces was C.S. Lewis’s final work of fiction.

Published in 1956, the novel retells the ancient myth of Cupid and Psyche from the viewpoint of Orual, a princess and queen. Lewis described it as a retelling of the myth, but the book is also a psychologically complex exploration of love, jealousy, self-knowledge, and religious understanding.

The novel’s subtitle is A Myth Retold. Unlike the Narnia books, it is set in an invented version of the ancient world and is aimed at an adult readership. Its narrator’s voice and moral ambiguity distinguish it from Lewis’s more overtly allegorical works.

That Hideous Strength, published in 1945, was the final volume of the Space Trilogy, not Lewis’s final fiction overall. Till We Have Faces appeared eleven years later.