Arihant Publications are the books which are highly recommended and used for preparing for the BA ECO hons IPU CET examination. RS AGGARWAL is another well known book as well. Go through these books and practice as many as MCQs as you can so that you are able to get the best experience of variety types of questions, and dont forget solving mock tests or sample papers at the end.

Refer to the site below for some preparatory tips for the exam -

https://engineering.careers360.com/tags/ipu-cet-preparation-tips

Best wishes. Thank you.