Alister McGrath, “C.S. Lewis — A Life: Eccentric Genius, Reluctant Prophet”

This is a very good and recent (2013) biography.  One annotation I made (139):  The fact that Lewis’s conversion was bifurcated — that is, first he became a theist, then a Christian — is “Interesting/reassurring” re my short essay (elsewhere on this site), “Why Am I Christian (and You Should Be, Too), in 600 Words.”