Now prepare for UPSC examinations with the help of Internal Security for Civil Services Main Examinations GS Paper III. The chapters of this book are terrorism followed by naxalism, north east India and role of external state and non state actors in creating challenges to internal security. There is also informative chapters like costal security, cyber security with money laundering and security challenges and their management in border areas. With chapters like organised crimes there is the last chapter that shares the idea of various security forces, agencies and their mandates. The author has taken utmost care to keep the language of the contents very lucid and easily understandable to enable easy comprehension and retention. Relevant examples and illustrations have been added for better understanding along with adequate questions at the end of every chapter for practice.