Thomas Wallace Knox was a journalist, author, and world traveler.

Since the completion of the railway from the frontier of Texas to the heart of the most northerly of the Spanish-American republics, there has been a rapid development of commercial and social relations between Mexico and the United States, and the tide of travel from one country to the other is steadily increasing year by year. These circumstances have led the author of "The Boy Travellers" to believe that his young friends everywhere would welcome a book describing the land of the Aztecs, its history and resources, the manners and customs of its people, and the many curious things to be seen, and adventures passed through, in a journey from one end of that country to the other.