Hi Buddy.

According to me the key behind JEE Main is our NCERT Books, But it won't be enough if you're aiming for rank like below 5000.

Some recommended books!

JEE Main Recommended Books for Physics

• Concepts of Physics Vol I and II by H.C. Verma
• Fundamentals of Physics by Halliday, Resnick & Walker
• Problems in General Physics by I.E. Irodov

JEE Main Recommended Books for Chemistry

• Numerical Chemistry by P. Bahadur
• Inorganic Chemistry by J.D. Lee
• Organic Chemistry by Paula Bruice Yurkanis
• Organic Chemistry by Morrison & Boyd

JEE Main Recommended Books for Mathematics

• Trigonometry by S. L. Loney
• Higher Algebra by Hall & Knight
• Coordinate Geometry by S. L. Loney
• Problems in Calculus of One Variable by I.A. Maron
• Arihant Mathematics JEE Main & Advanced

Source ; Careers360

But start with NCERT ! After going through syllabus.

Thank You!.