Hello ,

It is very good to know that you started your JEE/engineering exams preparation this early as it will be very helpful for you .

Different people will suggest you different books for each of the subject but you should stick to one only .

Books for all subjects :

• Physics : All NCERTS and HC VERMA vol 1+2 ,you can also refer to Irodov for practice problems .
• Chemistry : All NCERTs + OPTondon\RC Mukherjee .
• Mathematics : ALL NCERTs + RD Sharma .

You should also solve PYQ questions after completing your chapter .

Hope this helps.