The book is very important for 70th BPSC Exam, It covers the history, geography, and polity of India and Bihar. It starts with the prehistoric period, Indus Valley Civilization, Vedic age, and other ancient periods, leading up to the British rule, Indian nationalism, and the freedom struggle. The geography section covers basic concepts, the universe, continents, climate, soils, and resources, with a specific focus on Bihar. The polity section covers constitutional development, fundamental rights, executive, legislature, judiciary, federalism, and important institutions. The book also includes a section on philosophical systems and art and culture of Bihar.