2019: BCIM Economic Cooperation: Interplay of Geo-economics and Geo-politics, Routledge, London and New York, ISBN: 9780367733476
2017: ASEAN Calling: Development of India’s North-East through Sub-regional Cooperation, Pentagon Press, New Delhi, ISBN: 9789386618023
2016: Look East to Act East Policy: Implications for India’s Northeast, Routledge, London and New York, ISBN: 9781138667563
2015: Voices from the Border: Response to Chinese Claims over Arunachal Pradesh, Pentagon Press, New Delhi, ISBN: 9788182748347
2010: India-China: Trade and Strategy for Frontier Development, Bookwell, New Delhi, ISBN: 9789380574073
2008: Indo-Bangladesh Border Trade: Benefiting from Neighbourhood, Akansha Publishing House, New Delhi, ISBN: 9788183701327
2007: Human Development: Experiences of North East India, Akansha Publishing House, New Delhi, ISBN: 818370039X
8. Informality and Poverty: Urban Landscape of India’s North-East, Akansha Publishing House, New Delhi, ISBN: 8183700446
2005: Indo-Myanmar Border Trade: Status, Problems and Potentials, Akansha Publishing House, New Delhi, ISBN: 8183700071
2004: Dimensions of Rural Development in North-East India, Akansha Publishing House, New Delhi, ISBN: 8187606231
2002: Dimensions of Development in Nagaland, Regency Publications, New Delhi, ISBN: 8187498617
2000: Border Trade: North East & Neighbouring Countries, 2000, Akansha Publishing House, New Delhi, ISBN: ‘9788187606024
1998: Liberalization and India’s North East, Commonwealth Publications, New Delhi, ISBN: 9788171694983
1994: Demographic Profile of North-East India, Omsons Publications, New Delhi, ISBN: 817117129X