Book excerpt: Many conditions, cultures, and events have played a part in the history of New Mexico. The author, a recognized authority, guides the reader from the earliest land formations into the present time and has illustrated the narrative with photographs, maps, and artwork depicting various changes that took place during the many stages of New Mexico's development. Donald R. Lavash taught New Mexico junior and senior high school history for 13 years, and at the college level for two years. This book is the outgrowth of his teaching experiences and his feeling of a strong need for a New Mexico history text. Dr. Lavash was also the Southwest Historian for the New Mexico State Records Center and Archives for five years. He is the author of numerous articles and books on history and archeology.