The book Main Challenges of India's Internal Security, authored by Ashok Kumar and Vipul Anekant, is designed to provide aspirants with an in-depth understanding of the internal socio-political dynamics of the country, highlighting the interrelationships between development and the spread of extremism. In line with the syllabus of UPSC/State PSCs, the book covers all aspects of internal security and disaster management. Its primary objective is to help aspirants develop a comprehensive understanding of diverse internal security issues. Each topic is explained with historical context and contemporary significance, ensuring a micro-level understanding. In addition, it contains important information about modern challenges posed by social media and cyber security. Written in clear and simple language, the book is a ready reference for aspirants of the Civil Services Mains Examination. Its sixth edition contains revised chapters that develop an in-depth understanding of government policies related to internal and external security measures.