After a spate of recent cookbooks featuring oysters Rockefeller and braised pheasant, it's a relief to see that someone cares about what the poor eat. Newton's recipes and shopping guides are for rock bottom budgets including, typically, one geared to the retired couple living on Social Security and two more ""emergency low budgets"" for people subsisting on less than half the money estimated by the U.S. Dept. of Agriculture as the bare minimum. Under these strained circumstances starches--the least expensive source of calories--are the mainstay. Inevitably, Newton features beans: baked beans, fried, refried, bean soups and salads--with advice on how to supplement the incomplete protein of beans with complementary foods (rice, corn, powdered milk) to maximize nutritional content. The recipes may seem rather bleak and monotonous though Newton does what she can with herbs and spices--for which some money should be alloted in the tiniest budget. For the slightly more affluent there are recipes featuring chicken, variety meats, tuna fish. The Florida orange is about the only fruit which shoestring dining can accommodate. For families caught in the economic munch.