Published in the early 1950s, C. S. Lewis's seven Chronicles of Narnia were proclaimed instant children's classics and have been hailed in The Oxford Companion to Children's Literature as "the most sustained achievement in fantasy for children by a 20th-century author." But how could Lewis (a formidable critic, scholar, and Christian apologist)conjure up the kind of adventures in which generations of children (and adults) take such delight?...