This four volume project (available in cloth at $11.95; paper $6.95) is an exhaustive tour of Europe, country by country, not only how to travel with children- but where- and what to do with them. While Mrs. Hadley is not quite as sophisticated a cicerone as Violet Weingarten (You Can Travel with Children- Dutton-1961), she has had more experience, travelling with four of them through the years, and she has assembled an enormous body of information. The first volume is a pre-departure prepping on travel in general, firmly based on the belief that you can and should take them with you- even the cherub in disposable diapers even though he may absorb very little. This book deals with reading up on where you're going; securing information, inoculations and medicines; luggage and clothes (listed by age group), facts about packing, toys, travel media, etc. The successive volumes deal with currency, language (you may have to learn English too- i.e. Pillar box for Mail box), vital phone numbers, baby sitting services, summer camps, and then generic advice which is child -centered on museums, shops, castles, special trips, calendars of events of special interest, and accommodations from country to region to city or town. The emphasis is of course on the parent travelling with the pre-teen youngster, but there is a tremendous amount of helpful information, vital to incidental, and it's a very practical, preliminary reconnaissance. Go- go- go.