Hello Aspirant,
I took some survey from my seniors and faculty members. so, i can suggest you the best books for a average student to score good marks in jee mains as well as jee advanced 2021.
physics:
H.c.verma for theroy part of physics and cengage for objective part of physics.

Mathematics:
R.d.sharma for theroy part of mathematics and cengage for objective part of mathematics.

Chemistry:
NCERT books are the best for the theroy part of chemistry. Himanshu pandey for orgaric chemistry objective part and o.p tandon for the remaining objective part of chemistry.

If you can read all these books perfectly then you can have the ability to crack the jee mains as well as jee advanced exams.I Hope it will helps you.

Thank you.

See, it will be quite easy to score better if you are consistent and discipline. I am going to give you some tips and if you follow these, you will get success.

# TIP - 1

As only five months are left to JEE Main 2021, you should complete the syllabus quickly. If you are in 12th, try to revise the chapters of 11th on weekends and solve problems from them.

# TIP - 2

Make a proper schedule for consistent study. Make sure you don't waste time by reading introduction of chapters. Prepare short notes for quick revision. It will help you before exam.

# TIP - 3

Wake up early and have some exercise. Brain and body should work simultaneously. After getting admit card, you will come to know about the exam time. Practice problems during that time period so that your brain stays active on the day of exam too.

# TIP - 4

Join a test series or self evaluate by attempting full tests. It will enhance your time management skills. Make sure you don't do the same mistake what you do in mock tests. Don't attempt mock tests before completing 40% of the syllabus.

# TIP - 5

Solve as much as you can. Try to solve new problems as well as the previous years' for practicing the concepts. Clear doubts from teachers or from youtube videos or from books.

RECOMMENDED BOOKS FOR JEE MAIN AND JEE ADVANCED

• PHYSICS

1. Concepts of Physics by Prof. HC Verma ( for concepts ) *MUST READ
2. DC Pandey ( for solving problems )

• CHEMISTRY

1. NCERT *MUST READ
2. Cengage publishers

• MATHEMATICS

1. R.D Sharma
2. Previous years' problems *MUST SOLVE

All the best for JEE Main and Advanced 2021. I believe you will crack it.