If you are preparing for JEE Main exam it is recommended that you should refer NCERT books for your preparation as syllabus is based on them. You can also go for NCERT exemplar.

After, completing NCERT books you can recommended other books for your preparation.

It is very important that your concepts should be clear to score good marks in your exam.

You should also refer to previous year papers and complete mock test series for your practice.

You can refer Maharashtra board text book for your MHT CET preparation.

You can check the syllabus of JEE Main from the given below link

JEE Main Syllabus

Good Luck!!