From Frontiers to the Heartland: A Century of Sangh Parivar in the Northeast by Rouhin Deb and Nabaarun Barooah offers a compelling and deeply researched account of the Sangh Parivar?s complex and often overlooked journey in Northeast India. In a region marked by deep ethnic, cultural, and political diversity?as well as decades of unrest, marginalization, and contested identities?the book explores how this ideological force has evolved and expanded its influence. Drawing on oral histories, first-hand narratives, and extensive field research, the authors trace the Sangh Parivar?s efforts to navigate and engage with the region?s unique social fabric. From colonial-era missionary movements and the spread of Christianity to contemporary challenges like illegal immigration, insurgency, and regionalism, the book examines how the Sangh adapted its strategies to local realities while pursuing its broader ideological goals. It also highlights the tensions and negotiations involved in this engagement, challenging dominant narratives that frame the region solely through a lens of resistance or exclusion. Insightful and provocative, this book sheds light on a century of ideological outreach, cultural negotiation, and political consolidation, offering essential context for understanding Northeast India?s present-day political landscape.