Which Narnia book was published second, in 1951?

The Narnia book published second, in 1951, was *Prince Caspian*.

C. S. Lewis’s novel was published in the United Kingdom by Geoffrey Bles on 15 October 1951, following *The Lion, the Witch and the Wardrobe* in 1950. Its original title was *Prince Caspian: The Return to Narnia*, and it was the second book released in the series.

Publication order can cause confusion because later editions often number the books by Narnian chronology. In that system, *Prince Caspian* is commonly labeled volume four, while *The Magician’s Nephew* appears first because its story takes place at the beginning of Narnia’s history. That chronological numbering does not change the original publication sequence.

Lewis completed *Prince Caspian* in 1949, before the first Narnia book had appeared. The story brings Peter, Susan, Edmund and Lucy back to Narnia, where 1,300 years have passed there since their previous visit.