The Chronicles of Narnia is a classic fantasy book series by C.S. Lewis, consisting of seven books. The series is set in the magical land of Narnia, where talking animals, mythical creatures, and children from our world embark on epic adventures. The most famous book is The Lion, the Witch, and the Wardrobe, where four siblings discover Narnia through a wardrobe and help Aslan, the great lion, defeat the White Witch.