HC Verma the Bible of physics for JEE aspirant , COP is the most trusted book for JEE preparation and recommend for all no matter whether you average or topper student of your class . There was a Boy in my coaching , he was not a bright student in the start , the only books is used for physics is COP for entire 2 years , some student of my class are solving DC pandey and BM sharma but he just stick to one book and that is HC verma . When the result were out he got an All India rank 4XX . The point is never ignore the power of this book , the illustration given in this book is excellent for building Concepts. If you want to master mechanics then you should go for HC Verma after that you can solve IE Irodov if you Want . BUY From Amazon.in Thanks For Reading........! :)