Educational books on History, Political science an geography medieval India ( From Sultanate To the Mughals Delhi Sultanate 1206-1526),A History of South India From Pre-Historic times to the fall of Vijayanagar K.A Nilakanta Sastri, Politics Among Nations The Struggle for Power and Peace, Political theory Principles of Political Science, Social background of indian nationalism By Desai, History of India A Detailed study of Social, Cultural,Economic aspects from earliest times to 1760 AD Constitutional Development and National Movement of India, Medieval India 1526-1748 by Satish Chandra, Europe Since Napoleon By David Thomson, Fundamentals Of Historical Geology And Stratigraphy Of India, Early India by Romila Thapar  etc available now at ilandlo.com