Hello Aspirant,

If you are looking for free books for CAT preparation, then I'll recommend you to search on google and you will find many free resources for your preparation. Also, there are many telegram channels which provide free e-books for CAT preparation. However, these e-books might not be updated. But this will definitely help you in your preparation.

You can also visit the  following link for downloading few material for CAt exam:

https://bschool.careers360.com/download/cat-ebooks

Good Luck