hcv is starting book for iit physics u have to admit that its a damn good book..........the theory is well explained and ya problems r simple..........but if u see carefully only the first 20 sums r really simple in the sense direct formula....the basic idea of the author is to familiarise u with the formulas........but after 20 ques the prob become little tough but not very tough...........finally the last 5 ques r really good...........they can be assumed of jee level ............after finishing hcv u can go for ie eridov and if u can do that also then u will definitly clear jee physics