Dear Aspirant 

There are some best book available in market for preparation of iit jee main and advanced. 

• Physical chemistry by narendra avasthi
• Organic chemistry by Ms chauhan. 
• Inorganic chemistry balaji publication

All these three book is of balaji publication and is best book for preparation currently. 

Some other book you can follow are-:

• Chemistry by cengage publication 
• Ncert chemistry part 1 and 2

NCERT should be there along with these book because for mains Ncert covers almost 80 % of what you require. 

Good luck for your future :) 

Feel free to ask if you have any further queries.