This is: Mexico's Colonial Heart, by "Mexico" Mike Nelson and introduction by Carl Franz. Copyright 1995, 1st edition, Wanderlust Publications. This soft-cover book is in Very Good Condition, showing slight shelf wear on the cover edges, no tears or marks on the book. This book has 336 pages!
From the Publisher:
This book is a user friendly version of the famous Sanborn's Travel logs which offer the overland traveler to Mexico a mile-by-mile travel guide book and reference. This book is directed to anybody planning a trip to Mexico or just an armchair raveler who has an interest in reading about Mexico.