Which Narnia book was the final one published by C.S. Lewis?

The Last Battle was the final Narnia book published by C.S. Lewis, appearing in 1956. It concludes the seven-book series with the end of the old Narnian world and the entrance into what the story presents as a deeper, truer reality.

The novel centers on the false Aslan created by the ape Shift and the donkey Puzzle, whose deception leads to political and religious conflict. King Tirian, Jill Pole, and Eustace Scrubb become important figures in the resistance to the fraud.

Although it was published last, The Last Battle is not the final event in every character’s personal chronology in a simple linear sense. The series includes different protagonists and overlapping eras, and Lewis’s later publication of The Magician’s Nephew created a distinction between publication order and internal chronology.

The book won the Carnegie Medal in 1957, recognizing it as the outstanding children’s book of the preceding year. Its ending is among the most debated parts of the Narnia series because it combines apocalyptic imagery, judgment, loss, and renewal.