Many are husbands or wives who reach for the missing partner on the other side of the bed, only to feel the cool, empty sheets. Others are children, young and old, who suddenly realize that their hero is gone, leaving the world a strange, uncomfortable, somewhat menacing place. Some are parents whose plans and dreams fade away as they watch their child slip out of their arms into the arms of God. Dr. Barber writes separately about each age group (toddlers,...