Kamatapur: An Unexplored History of Eastern India (650-1498)' is the first book and first writing on the history of Kamatapur (Kamta kingdom) and on Kamatapur. As it is the first effort to bind facts together to give a shape to understand what Kamatapur was or what the history of Kamatapur is, those who want to know about Kamatapur will love and like this book. Devoid of historical knowledge, we miss the linkage with the past, with our civilizational roots, political and social legacy and cultural heritage; therefore, while living for generations in the historical-geographical location of ancient Kamatapur or Kamta (Kamata) kingdom in the Tista-Brhmaputra valley, the people of the area comprising ancient Kamatapur must not, should not and can not ignore the history of Kamatapur. We have to learn what Kamatapur was and Kamatapur stood for; after all, it is to fill up and save our memory of the past appertaining to Kamatapur.