Many have wondered about the Chronicles of Narnia, unable to answer questions that arise from their reading: Why are there seven books? Why are only three of them obviously biblical allegories? Does the series lack coherence? Many have attempted to find the organising key, but failed. However, in The Narnia Code Michael Ward presents an astonishing literary discovery. Drawing on the whole range of Lewis' writing, Ward reveals the single subject that provides the link between all seven novels in the Chronicles of Narnia. He explains how Lewis structured the series, why he kept the code secret, and what it shows about his understanding of the universe and his Christian faith.