IAS - Genral Studies

Indian History & Culture:
NCERT (+ 2 level) — Ancient India, Medieval India, Modern India.
Publication Division : Gazetteer of India (Vol 2 : History & Culture)
Vaid's Study Notes.
Gandhi Nehru Tagore & Ambedkar—Gopal Krishna
Raghavan Aiyer—Mahatma Gandhi

Geography:
NCERT (+2 level)
Sharma & Cotinho : Economic and Commercial Geography of India.
Indian Economy
NCERT (+1 level)—Evolution of Indian Economy.
Mishra & Puri or Dutt & Sundaram
Bimal Jalan

Indian Polity:
NCERT (+1 level)—Indian Political System
N.L. Madan : Bhartiya Rajya Vyavastha
D.D. Basu—Indian Constitution
Kashyap—Constitution of India
Publication Division—Subhash Kashyap : Our Parliament
P.M. Bakshi—Indian Constitution

Science:
NCERT : (10 level) : Science, (+2 level) : Biology.
Popular Science Series (CSIR)

Statistics:
(NCERT +1 level) Elementary Statistics
Other Books
1. India Year Book latest
2. One competitive Magazine
3. Economic Times & The Hindu
4. Yojana/Kurukshetra.