This entry in the ``Hippocrene Companion'' series has a similar scope and format to Graeme Newman and Tasmin Newman's Guide to Australia ( LJ 3/15/92). It eschews the listings of hotels, schedules, and other changing information available in traditional annual guides, offering instead an informative overview of Mexico and its people, customs, and land. Latin American specialist Burke (history, Villanova Univ.) does advise on how to enter the country, what to bring, what to see, health, driving, money, and many other important subjects. To be read before going to Mexico and in planning a route, this book is highly recommended, but a more conventional guide (or a travel agent) will also be necessary for details on modes of travel or where to stay and eat. -- George M. Jenks, Bucknell Univ., Lewisburg, Pa.