Mr Mani's books on Patriotism offer a deep insight into the Patriotic  fervours that burned bright on their souls. One of his books "The origin and growth of Nationalsim" which traces the history of nationalsim from 1600 to 1947 has seen three editions so far. It appeared in the book which he published. The author has also published information on the Congress in a question and answer format. It is the first political encyclopedia of the Congress and would be very useful in political education.