The NCERT books are considered enough for preparation for competitive entrance exams. I would suggest you to first complete studying the NCERT books for class 11 and 12 for Physics, Chemistry and Maths.  For Mathematics, use the following books-

    • Higher Algebra by Hall & Knight

    • Maths XI & XII by NCERT

    • Co-ordinate Geometry by S. L. Loney

For Physics -

    • Problems in General Physics by I.E. Irodov

    • Fundamentals of Physics by Halliday, Resnick & Walker

    • Concepts of Physics Vol I and II by H.C. Verma

Know the preparation tips for JEE Main, click on the link- https://engineering.careers360.com/articles/jee-main-preparation-tips

11th and 12th both should be referred to prepare for JEE Mains. It is because 11th contains the basics after which you can move on to 12th standard NCERT textbooks. 

After completing NCERT textbook you can go for reference books available. There are many reference books available. 

For Physics you can refer HC Verma volume 1 and volume 2. For Mathematics you can refer RD Sharma. For chemistry you can refer Chemical Calculations by RC Mukherjee or books by OP Tandon. But make sure that you complete NCERT first. 

If you still have any queries feel free to ask in the comment section down below. 

Hello,

Yes, the best books to prepare for jee mains is NCERT books (12th class ncert books) for each subjects.

If you want practice more than you refer these books;

1. For physics;

• HC Verma Concept of Physics Part 1.
• HC Verma Concept of Physics Part 2.
• IIT JEE Physics by D.C. Pandey.
• Problems in General Physics by I.E. Irodov.
• Physics for IIT JEE by Resnick, Halliday, Walker.
• Problems in Physics by S.S. Krotov.

2. For chemistry;

• Organic Chemistry by Morrison Boyd.
• Organic Chemistry by O.P. Tandon.
• Inorganic Chemistry by O.P. Tandon.
• Modern approach to chemical calculations by R.C. Mukherjee.
• Numerical Chemistry by P.Bahadur.
• Concise Inorganic Chemistry by J.D. Lee.

3. For mathematics;

IIT Mathematics by M.L. Khanna.

• Differential Calculus by A Das Gupta.
• Class XI and XII Mathematics by R.D. Sharma.
• Trigonometry, Geometry Books by S.L. Loney.
• Problems in Calculus of One Variable by I.A. Maron.
• Higher Algebra by Hall and Knight.

Hope this will help you. All the best.

Hello Gokulraj,

please go through this link to know about the books.

https://engineering.careers360.com/articles/best-books-for-jee-main-2019