Hello candidate,

If you are looking for instant boost for your JEE mains preparation, then oswaal books is one of the best books you can look around.

It has a good and detailed review of questions of the same standard as asked in the examination and it can also help you to get a quick look at some of the most important formulas and topics which you need to prepare before giving the examination. Other important book known as "Arihant all in one", could also be helpful for you.

Hope it helps!!