Need recommendations from Seniors
 

I will hopefully attempt in 2021. As you all probably know we are not left with much time. So I need book recommendations for my optionals. Any respected seniors especially those wo have passed the written kindly recommend some books. I want books that can cover the whole syllabus so I don't have to prepare from other sources. I know only preparing from one book is not sufficient. I will do if I have some time after completing the syllabus.
Following are my optionals:[LIST=1][*]IR[*]Sociology [*]US History[*]Criminology [*]Gender Studies[/LIST]And last thing, can I prepare from the books published by NOA (National Officers Acadmey)?
Thanks.