It’s been 20 years since I published a profile of C.S. Lewis’s wife, “Lost in the Shadow of C.S. Lewis’ Fame: Joy Davidman was a Noted Poet, a Feisty Communist and a Free Spirit,” in TheSan Francisco Chronicle on January 1, 2006. It was a good thing to do, because at that point relatively little had been written about Joy Davidman’s life and achievements.