The Last Battle is a high fantasy novel for children by C. S. Lewis, published by The Bodley Head in 1956. It was the seventh and final novel in The Chronicles of Narnia (1950–1956). Like the others it was illustrated by Pauline Baynes and her work has been retained in many later editions.

The Last Battle is set almost entirely in the Narnia world and the English children who participate arrive only in the middle of the narrative. The novel is set some 200 Narnian years after previous novel The Silver Chair and about 2500 years since the creation of the world narrated in The Magician's Nephew. A false Aslan is set up in the north-western borderlands and conflict between true and false Narnians merges with that between Narnia and Calormen, whose people worship Tash. It concludes with termination of the world by Aslan, after a "last battle" that is practically lost.

Plot

Narnia has had peace and prosperity since the reign of King Caspian X, but Roonwit the Centaur warns Tirian, the latest king of Narnia, that strange and evil things are happening to Narnia and that the stars portend ominous developments.

An ape named Shift has persuaded a well-meaning but simple-minded donkey called Puzzle to dress in a lion's skin and pretend to be the Great Lion Aslan. Using Puzzle as his pawn, Shift convinces the Narnians that he speaks for Aslan. Once the Narnians are convinced that Aslan has returned, Shift orders the Narnians to work for the Calormenes, and to cut down Talking Trees for lumber. The money will be paid into "Aslan's" treasury, held by Shift, on the pretext that it will be used for the good of the Narnians.

King Tirian and his friend Jewel the Unicorn at first believe the rumours of Aslan's return, but realize the lie when they hear Shift telling the Narnians that Aslan and the Calormene god Tash are one and the same. When Tirian accuses the ape of lying, the Calormenes overpower the king and bind him to a tree. He calls on Aslan for help and receives a vision of Digory Kirke, Polly Plummer, Peter Pevensie, Edmund Pevensie, Eustace Scrubb, Lucy Pevensie, and Jill Pole, though he does not know who they are. (Susan does not appear because she has stopped believing in Narnia, thinking of it only as some silly childhood game she had played when she was younger and immature.) The people in the vision also see Tirian and, though Tirian can't speak to them, they guess he is a messenger from Narnia. A few minutes later by Narnian time – although a week later from their perspective – Jill and Eustace arrive in Narnia. They release the King and rescue Jewel and Puzzle. A band of dwarfs are also rescued, but because their faith in Aslan has been shattered, they refuse to help, claiming "the dwarfs are for the dwarfs". Only one dwarf, Poggin, is faithful to Tirian, Aslan, and Narnia