Hi Prarthana! NCERT Books for JEE Main are usually enough to prepare. Sometimes NCERT textbooks may have limited depth but the lion’s share of weightage is from Class 11 and class 12 NCERT books. Apart from NCERT books, you can also refer to Concepts of Physics by H.C. Verma – Volume 1 and Volume 2, Algebra for JEE Main & Advanced by Arihant Publication, Modern Approach to Chemical Calculations by RC Mukherjee.