What was C.S. Lewis’s last completed book of fiction?

Till We Have Faces was C.S. Lewis’s last completed book of fiction.

The novel was published in 1956 and retells the Cupid and Psyche myth through the voice of Orual, a ruler in the fictional kingdom of Glome. Lewis regarded it as one of his strongest works, and it differs from the children’s fantasy style associated with the Narnia books.

The Chronicles of Narnia had concluded with The Last Battle in 1956, but Till We Have Faces was also published that year and represents Lewis’s final completed novel. The Space Trilogy had ended earlier, with That Hideous Strength in 1945.

Readers sometimes identify The Last Battle as Lewis’s final fiction because it was the last Narnia volume and won the Carnegie Medal. The distinction matters: The Last Battle is the final Narnia book, while Till We Have Faces is generally identified as Lewis’s last completed work of fiction.