He was 91.
Das was a bachelor and was suffering from old age related ailments. He was a recipient of the prestigious "Sarala Award" for his achievement in the literary field.
'Banhimana', the biography of freedom fighter Malati Chaudhury, brought him the Sarala Award in 2014.
Das had written a number of books on the history of India's freedom struggle and the role of Odisha. His books on struggles of peasants against kings and Zamindars had won accolades from various quarters.
These include 'Kalapanira Angisikha', 'Agnujugar Aahwan', 'Bharatara Sasastra Mukti Sangram', 'Sahid Basu Bisnini', 'Kanika Prajaandolan Itihas', 'Netaji Aao feri Nahanti', 'Fashi Manchare Biplabi' and many more.
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