D'alluisio and Menzel, authors of the poignant Material World, chronicle diverse families in this portrait of global nutrition. The 25 featured clans, each strikingly photographed surrounded by a week's worth of food, range from hunters in Chad to subsistence farmers in Ecuador to abundantly well-fed Americans. This engrossing read raises the issue of world food supply. Includes recipes.  (GEN478, $22.99)