A sure seller -- a sort of Emily Post for the moderate income group. (Perhaps Miss Wilson, whose clientele in her school of charm probably contains some of the arbiters of the upper crust social activities, may resent the suggestion -- but here's where such a book is needed and here where I think this one belongs.) The whole gamut of social problems (from the etiquette angle) is covered, and many concrete suggestions are included along with the theory, for such important things as the sort of food to serve at all sorts of functions, from the maidless emergency meal,-to elaborate wedding breakfasts. Done with a light touch, some humor, an appreciation of the awkwardness of not knowing what to do, how to do it, what to wear, where to wear it, how to be a hostess and how to be a guest, how to stay at home and how to travel, and etiquette from bibs to funerals. Modern enough and elastic enough to fit east and west, north and south, city and small town, and smart enough not to patronize.