Joy Davidman is known, if she is known at all, as the wife of C. S. Lewis. Their marriage was immortalized in the film "Shadowlands" and Lewis's memoir, "A Grief Observed." Now, through extraordinary new documents as well as years of research and interviews, Abigail Santamaria brings Joy Davidman Gresham Lewis to the page in the fullness and depth she deserves. A poet and radical, Davidman was a frequent contributor to the communist vehicle "New Masses" and an active member of New York literary circles in the 1930s and 40s. After growing up Jewish in the Bronx, she was an atheist, then a...