Going through the previous years papers of CIC B.A. Honors entrence exam ( B.Tech ) and( B.A.Hons.) will help you get acquainted with the syllabus + pattern of the paper in the past five years.

These are some of the books I used, which helped me become a part of CIC.

https://allaboutcic.com/2018/05/24/books-for-final-preparation-of-cic-b-a-hons-entrance-examination/

These were some book recommendation from the B.A.Hons. toppers

all the best!