Hi Deep,

AILET and CLAT are comptetitive exams that require pratice more than anything. They are easy if you have extensively practiced. 

For this reason, books are a better option because you have lots of questions, worksheets and papers to solve as you go about preparing. However, you may substitute this with referring to material online.

www.lawentrance.com is beneficial for you.

Still, doing pratice papers is of paramount importance and therefore, you must work on several tests and quizzes while preparing.

Hope this helps,

All the best!