Best Geography Optional Booklist
There are actually 8 books that cover almost 80-85% of the syllabus.
It is updation, enrichment and deeper conceptual clarity that requires more books and coverage of current affairs based questions. Sincerely managing GS goes a long way in helping geography too.
Basic Books:
Reference Books
Physical Geography by Savindra Singh (If one wants to avoid specialised books for Physical Geography syllabus. There are 5 specialised books by Savindra Singh have certain specific chapters which are not covered through the above book. Coverage of above Physical Geography text book covers almost 80% of the physical geography syllabus). For the other topics of the Physical geography syllabus, one has to refer to about 2-3 chapters from each of the below books: One can take photocopies of the select chapters from libraries and study rather than buying these books
Other References:
Like in all other subjects, and in GS, students must read up various magazines and current affairs based enrichment. Some of the sources one can be regular with are: