Hello Aspirant,

See NCERT is must have book for preparation of JEE-Main and JEE-Advance like national level entrance examination but it is not sufficient to crack them because for such exams the aspirants should have decent practice and NCERTs are only good for concept reading not for practice because it does not contain that much of questions to practice.

So I am enlisting down some best books for preparation of JEE-Main apart from NCERT :-

@Physics

• Concepts of Physics-H. C. Verma
• Fundamentals of Physics-Halliday, Resnick and Walker
• Problems in General Physics-I. E. Irodov
• University Physics-Freedman and Young
• Understanding JEE physics series-DC Pandey
• Problem In Physics-SS Krotov

@Mathematics

• Higher Algebra-Hall and Knight
• Coordinate Geometry-S.L. Loney
• Differential and Integral Calculus-N. Piskunov
• Calculus and Analytic Geometry-Thomas and Finney
• IIT Mathematics for JEE Main & Advanced-M.L. Khanna
• Course in Mathematics for IIT-JEE-Tata McGraw Hill publication
• Problems Plus in IIT Mathematics-A Das Gupta
• Trigonometry-S L Loney

@Chemistry

• Modern Approach to Chemical Calculations-RC Mukherjee
• Organic Chemistry-Solomons and Fryhle
• Concise Inorganic-J. D. Lee
• Organic Chemistry-Morrison and Boyd
• University Chemistry-Freedman and Young
• Physical Chemistry-N Awasthi
• Arihant's Practice Book Chemistry for JEE Main And Advanced-R.K Gupta

You can also check out the JEE-Main knockout package for preparation of JEE-Main from the link given below :-

https://learn.careers360.com/knockout-jee-main-april/

I hope this information helps you.

Good Luck!!