evidence to support his claims. The opening of the book introduces the overarching question regarding the authorship of Ohio's ancient mounds, emphasizing the interest and intrigue surrounding them. Thomas presents evidence that, contrary to the belief that an advanced but now extinct civilization constructed these mounds, they were actually the work of indigenous tribes who were still present upon European contact. He outlines his argument, which is mainly focused on demonstrating that the mounds tie back to several Indian tribes, highlighting the similarities in burial customs, artifacts, and cultural practices between the mound builders and the historical tribes of North America. It sets the stage for a detailed examination of the cultural connections between the mounds and the people who built them, making a case for an indigenous origin of these significant historical structures. (This is an automatically generated summary.)