No. Magician's Nephew is a direct allegory for Genesis, and the Lion, the Witch, and the Wardrobe is a point by point retelling of the crucifixion and resurrection. The other books have Christian themes and symbols for things like baptism, becoming born again, etc. But those two and the Last Battle (representation of Revelation) are allegorical. They are meant to direcrly symbolize biblical events. He also wrote another allegory, Pilgrim's Regress.