Hello Aspirant,

See preparing for jee is in itself a challenge because it's like a ocean and In that you can catch the right boat if and only if you swim the right way.

So, for mathematics I would say if you are strong with your concepts , memorize by heart the Allen handbook of mathematics , but if you are not good with your mathematics then I would say brush up through any good maths book in which concepts are clear and formulae are explained.

For physics follow D.C Pandey to understand the concepts and for practice you can solve the jee mains previous years .

For chemistry, it is best you follow NCERT books as it's beneficial.