Hello Bablu, HC verma books are the bible for JEE Mains and Advance . You should atleast read it once atleast and if possible you should go through it more than once. Try to solve the hard ones which are given at the last of every excercise of every unit . You should definitely go for HC Verma and in order to make your Physics part strong enough for JEE Mains and Advanced , i highly recommend you HC Verma. Although you can also go DC Pandey 's series of Physics Textbook for JEE Mains and Advanced as it contains very good and wide variety of questions particularly for both JEE Mains and Advanced but if you can first go through HC Verma and then make your way to DC Pandey , it will be great for you and your preparation.

I hope that i could have helped you , all the best for your future and thank you for contacting Carrers 360.