You should start your preparation by NCERT books. It is best book to clear your basics and to build your fundamentals strong. You can easily score good marks if your concepts are clear even you can solve tricky questions.

After, NCERT you can refer below recommended books for JEE

Physics

You can go for HC Verma, DC Pandey, I.E. Irodov, Resnick, Halliday, Walker and S.S. Krotov.

Chemistry

You can go for Morrison Boyd, O.P Tandon, R.C. Mukherjee, P. Bahadur and J.D. Lee.

Mathematics

You can go for M.L. Khanna, A Das Gupta, R.D. Sharma, S.L. Loney, I.A. Maron and Hall and Knight.

Make sure you also refer previous year papers to understand the exam pattern and level of questions. Solve Mcqs for your practice and complete mock test series to analyze your preparation level.

Good Luck!!