JEE Main

Getting a rank under 100 in IIT-JEE is a pretty hard nut to crack. Not everyone can achieve this, but if you are determined then we all know everything can be achieved. For this, you will have to study every single day. Not just study, but study in a good way or we can say you will have to do smart work not hard work.
Here are few books to score good marks in JEE Mains:
Physics:
1. Concept of Physics (Both Part 1 & 2) by HC Verma
2. Problems in General Physics by I.E. Irodov. This book is really very good. You can solve this book after solving topics from HC Verma.
3. Aptitude Test Problems in General Physics by Krotov, but go through this book only when you are very good. Otherwise, this book may hamper your preparation.
4. Understanding Physics by DC Pandey.
This is quite a good book to score good marks as it has competition corner in which questions are quite good.
Chemistry:
R.C. Mukherjee for Physical Chemistry problem
Morrison and Boyd for Organic chemistry
Solomon's and Fryhle for Organic chemistry
J.D. Lee for Inorganic Chemistry
O.P. Tondon for Physical Chemistry
Mathematics
TMH old edition book (2003 or earlier). This is one of the best books, but you should take only old edition, I am not talking about new edition(s).
Cengage books. This is also good and questions are also good.
One must go with the best coaching module such as Resonance, FIITJEE or Allen and must solve the past 37 years JEE problems.
All the best.

Hello Dhruv,
There are two parts namely JEE Mains and JEE Advanced.
In mains, the questions are not that tough, but they require high conceptual knowledge and solving skills.
The questions are from PCM only based on classes 11&12 syllabi (NCERT).
First, you can go through the concepts in PCM as they play a major role in any of the exams.
The questions in JEE Mains will be generally easy, but you need to master the concepts to be fast in answering as the time is not more.
You can prefer NCERT books for getting conceptual clarity. Then you can prefer TMH (Tata Mc graw hill) and Arihant books for PCM concepts as well as problems.
They are really good books for JEE preparation and they provide good quality of exercises for practice.
You can solve as many problems as you can within time limit so that they will provide you a better way of preparation for JEE Mains.
The previous year papers would help you a lot to understand the quality of questions in JEE.
At the last days of preparation, it is good to avoid new topics and give as many mock tests as possible.
Stay focused and work hard.