Have a look at what is there inside BPSC Notes.
Complete Study Material has 9 Volumes ( For samples click on the hyperlink)
VOLUME 1 – ANCIENT INDIAN HISTORY AND HISTORY OF BIHAR
VOLUME 2 – MEDIEVAL INDIAN HISTORY, GEOGRAPHY OF BIHAR AND INDIAN ART & CULTURE
VOLUME 3 – GEOGRAPHY OF INDIA
VOLUME 4 – MODERN INDIAN HISTORY AND STATISTICS
VOLUME 5 – INTERNATIONAL RELATIONS
VOLUME 6 – INDIAN SOCIETY, ENVIRONMENT & ECOLOGY, GOVERNANCE, AND WORLD GEOGRAPHY
VOLUME 7 – INDIAN & BIHAR POLITY
VOLUME 8 – INDIAN ECONOMY AND DISASTER MANAGEMENT
VOLUME 9 – AGRICULTURE, SCIENCE AND TECHNOLOGY AND POST-INDEPENDENT INDIA