This nonfiction book explores the rise, brilliance, and mysterious disappearance of ancient cities across the Americas. Through archaeological discoveries, scientific analysis, and historical evidence, it reveals how urban centers such as Teotihuacan, Cahokia, and the great Maya cities were built, flourished, and ultimately abandoned. The book examines engineering achievements, social systems, environmental pressures, and cultural forces that shaped these civilizations, offering a vivid look at the urban worlds that once dominated the continent and the clues they left behind.