Hi Dear,

It is recommended to go through following NCERT books to crack IAS exam:

• NCERT Class VI – Our Past
• NCERT Class VII – Our Past -I
• NCERT Class VIII – Our Past II and III
• NCERT Class IX – India and the Contemporary World – I
• NCERT Class X – India and the Contemporary World – II
• NCERT Class XI – Themes In World History
• NCERT Class XII – Themes In Indian History – I
• NCERT Class XII – Themes in Indian History – II
• NCERT Class XII – Themes In Indian History – III
• NCERT Class VI – The Earth Our Habitat
• NCERT Class VI (Old) - Lands and Peoples Part I
• NCERT Class VII – Our Environment
• NCERT Class VII (Old) - Lands and Peoples Part II
• NCERT Class VIII – Resource and Development
• NCERT Class VIII (Old) - Lands and Peoples Part III
• NCERT Class IX – Contemporary India – I
• NCERT Class X – Contemporary India – II
• NCERT Class XI – Fundamentals of Physical Geography
• NCERT Class XI – India – Physical Environment
• NCERT Class XII – Fundamentals of Human Geography
• NCERT Class XII – India – People and Economy
• NCERT Class IX – Political Science: Democratic Politics Part – I
• NCERT Class X – Political Science: Democratic Politics Part – II
• NCERT Class XI – Political Science: Indian Constitution at Work
• NCERT Class XI – Political Science: Political Theory
• NCERT Class XII – Political Science I: Contemporary World Politics
• NCERT Class XII – Political Science II: Politics in India since Independence
• NCERT Class IX – Economics
• NCERT Class X – Understanding Economic Development
• NCERT Class XI – Indian Economic Development
• NCERT Class XII – Introductory Microeconomics
• NCERT Class XII – Introductory Macroeconomics
• NCERT Science books

Good Luck