America Not Discovered by Columbus investigates claims that the Americas were visited by explorers before Columbus’ 1492 voyage. The book reviews historical sources, maritime records, and archaeological evidence to challenge conventional accounts of European discovery. The work discusses potential pre-Columbian contact by Norse explorers, Asian seafarers, and other early travelers, evaluating the credibility of each claim. It also explores the implications of these findings for understanding cultural exchange, settlement patterns, and the historiography of exploration. While aiming to provide an alternative perspective on early exploration, the book situates its arguments within broader discussions of history, archaeology, and the interpretation of evidence.