Physical Geography by Savindra Singh
Certificate Physical and Human Geography by Goh Che Leong
Ncert 11th & 12th geography textbooks (can be downloaded free online from official NCERT website.)
Human Geography by Majid Hussain
Evolution Of Geographical Thought by Majid Hussain
Indian Geography by Khullar
Geographic theories by K.Siddartha or Majid husain
The Orient blackswan Atlas
Oxford atlas
Spectrum’s geography guide for illustrations & miscellaneous topics
Made Simple series of Rupa publication (2 books)
Shankar sir’s class notes
 
Paper 1 : 
Geomorphology/climatolgy & oceanography – Physical geography by savindra singh
Biogeography & ecology part of environmental geography – Rupa series
Contemporary areas of bio/environmental geography – no specific preparation. Just what i read in magazines & newspapers
Human geo theories – Human Geography By Majid Husain
World agriculture in economic geo – Models, theories & processes by Siddartha &
Certificate Physical and Human geography by goh cheng leong
Population geo – Human Geography By Majid Husain
Settlement geo – Spectrum’s geography guide (Ed. I think author is “Rajiv Ahir”)
Regional planning – mainly handouts given by shankar sir (photocopy from some textbook)
Models, theories & laws – Geographic theories by Siddartha & parts from Majid husain
 
Paper 2 : (Indian Geography)
Regional development & planning – mainly handouts given by shankar sir (photocopy from some textbook)
Settlements – NCERT & Spectrum’s geography guide
Political geo – no specific material, just class discussions with shankar sir
Contemporary issues – no specific preparation. Just what i read in magazines & newspapers
For the rest about india, ncerts & Indian Geography by Khullar is more than sufficient