Allegory > The Chronicles of Narnia

These books are great, quick reading, although the Christian overtones can grow old with time. I'm not quite sure how to suggest them, as I grew up with them - but I can't imagine not having done so. Reading about Mr. Tumnus carrying parcels through a snowy forest in The Lion, The Witch, and the Wardrobe is one of my earliest memories. - @RichardLitt