Publication, 1961. Phanibhusan Chakravartti, M.N. Roy. Calcutta: M.N. Roy Death Anniversary Observance Committee, 1961. Prakash Chandra, Political Philosophy of M.N. Roy. Meerut: Sarup & Sons, 1985. Satyabrata Rai Chowdhuri, Leftism in India, 1917–1947. Basingstoke, UK: Palgrave, 2007. Ramyansu Sekhar Das, M.N. Roy the Humanist Philosopher. Calcutta: W. Newman, 1956. B.N. Dasgupta, M.N. Roy: Quest for Freedom. Calcutta: Firma K.L. Mukhopadhyay, 1970. Niranjan Dhar, The Political Thought of M.N. Roy, 1936–1954. Calcutta: Eureka Publishers, 1966. S.M. Ganguly, Leftism in India: M.N. Roy and Indian Politics, 1920–1948. Columbia, MO: South Asia Books, 1984. Dharmadasa Goonawardhana and Debassaran Das Gupta (eds.), Royism Explained. Calcutta: Saraswaty Library, 1938. Michael Goebel, "Geopolitics, Transnational Solidarity, or Diaspora Nationalism? The Global Career of M.N. Roy, 1915–1930,"European Review of History 21, no. 4 (2014), pp. 485–499. D.C. Grover, M. N. Roy: a Study of Revolution and Reason in Indian Politics. Calcutta: Minerva Associates, 1973. John Patrick Haithcox, Communism and Nationalism in India; M.N. Roy and Comintern Policy, 1920–1939. Princeton, NJ: Princeton University Press, 1971. V.B. Karnik, M.N. Roy: Political Biography. Bombay: Nav Jagriti Samaj, 1978. Usha Krishna, M.N Roy and the Radical Humanist Movement in India: A Sociological Study. Meerut: Chaudhary Charan Singh University, 2005. B. K. Mahakul, "Radical Humanism of M.N. Roy," Indian Journal of Political Science, vol. 66, no. 3 (July 2005), pp. 607–618. In JSTOR Kris Manjapra, M.N. Roy: Marxism and Colonial Cosmopolitanism. Delhi: Routledge India, 2010. Giles Milton Russian Roulette: How British Spies Thwarted Lenin's Global Plot, Sceptre, 2013. Innaiah Narisetti (ed.), M.N. Roy: Radical Humanist: Selected Writings. New York: Prometheus Books, 2004. R.L. Nigram, Radical Humanism of M.N. Roy An Exposition of his 22 Theses. n.c.: Indus Publishing Co., n.d. Robert C. North and Xenia J. Eudin, M.N. Roy's Mission to China: The Communist-Kuomintang Split of 1927. Berkeley: University of California Press, 1963. Vishnudeo Narain Ojha, M.N. Roy and His Philosophical Ideas. n.c. [Muzaffarpur]: Shankhnad Prakashan, 1969. Alok Pant, Indian Radicalism and M.N. Roy. Delhi: Adhyayan, 2005. Govardhan Dhanaraj Parikh (ed.), Essence of Royism: Anthology of M.N. Roy's Writings. Bombay: Nav Jagriti Samaj, 1987. Ramendra, M. N. Roy's New Humanism and Materialism. Patna: Buddhiwadi Foundation, 2001. Sibnarayan Ray, In Freedom's Quest: Life of M.N. Roy (Vol. 1: 1887–1922). Calcutta: Minerva, 1998. —No other volumes issued. M.N. Roy: Philosopher-Revolutionary: A Symposium. Calcutta: Renaissance Publishers, 1959. Dipti Kumar Roy, Leftist Politics in India: M.N. Roy and the Radical Democratic Party. Calcutta: Minerva, 1989. Trade Union