The Horse and His Boy is a novel for children by C. S. Lewis, published by Geoffrey Bles in 1954. Of the seven novels that comprise The Chronicles of Narnia (1950–1956), The Horse and His Boy was the fifth to be published; it is also one of four of the novels that Lewis finished writing before the first book in the series had been published. In recent editions of The Chronicles of Narnia, that are sequenced according to the history of the fictional land of Narnia, The Horse and His Boy is the third book in the series.[a] Like the other novels in The Chronicles of Narnia, it was illustrated by Pauline Baynes; her work has been retained in many later editions.