The Indian Administrative Service is the premier administrative civil service of the Government of India. IAS officers hold key and strategic positions in the Union Government, States and public-sector undertakings

Here as per your demand I am suggesting you some books of IAS Examination that you can refer for your preparation:

Indian History:
-India Struggle for Independence by Bipin Chandra
-NCERT Books (XI and XII)
-Gandhi Nehru Tagore and Ambedkar by Gopal Krishna
-Modern India by Bipin Chandra
-History of Modern India by A.C.Banerjee

Geography:
-NCERT Books (XI and XII),
-Economic and Commercial Geography of India by Sharma and Cotinho
-India - A Comprehensive Geography by Khullar
-General Principles of World Geography by Charles Farro
-School Atlas

Indian Economy:
-NCERT Books
-Evolution of Indian Economy by I C Dhingra
-Indian Economy by Mishra and Puri
-Economic Survey by Dutt and Sundaram
-The Economic Times
-Business Standard
-Pratiyogita Darpan
-National Journal Yojana

Indian Polity:
-Constitution of India by Bakshi
-NCERT books on Indian Political System
-Bhartiya Rajya Vyavastha by N.L. Madan
-Indian Constitution by D.D. Basu
-Indian Constitution by P.M. Bakshi
-Our Constitution by Subhash C. Kashyap

General Science:
-Tata Mc Graw Hill Guide
-NCERT Books
-Popular Science Series (CSIR)
-Reports of the Ministry of Science and Technology by Yojana
-Science Reporter
-Science and Technology in India by Spectrum
-Anatomy and Physiology by Evelyn Pearce

Current Affairs: Some magazines and newspapers as follows can be utilized:
-India Today

-The Hindu/The Times of India
-Frontline
-Civil Service Chronicle
-Chanakya
-Competition wizard
-Civil Services Today

Mental Ability:
Quantitative Apitude by R.S. Aggarwal

Data Interpretation:
Data Interpretation and Data Sufficiency by Tyra and Kundan

English Comprehension and Communication:
Objective General English by R.S. Agarwal

Logical Reasoning:
-A Modern Approach to Verbal Reasoning by R.S. Agarwal
-A new Approach to Reasoning by Sijwali and Sijwali