hi Sanjay,

For CAPF preparations there are alot of books you can considered.

Here is the list of some good books according to me that you can gove prefrences as follows :-

1.History-

brief history of modern india

general studies paper by TMH

ncert history

2.Polity-

ncert civics

indian polity by laxmikanth

3.Geography-

biodiversity and environmental studies

upsc capf practical workbook

cbse 15 sample papers from class 12th ncert

4.Economics-

ncert

general studies paper by TMH

5.Science-

ncert from 6th to 12th

6.Aptitude-

logical reasoning by Arun Sharma

verbal&non-verbal reasoning by RS Aggarwal

7.Current affairs-

go for the Hindu newspapers

8.cds books also helps out in your capf exams as:-

pathfinder cds;Adhyaywar khandwar solved papers;upsc cds ;etc.

Hope this will help you out.

Also,check out some online books and courses.

Good luck.