Hello Ravi,
I am not aware of any books that can help teach you how to use a Bloomberg terminal. If you have access to a terminal Bloomberg has really upgraded their support for the device. That is, there are tutorials embedded on the machine that can teach you how to use it. For what it is worth, when I began my career I had no experience with a Bloomberg terminal and that did not seem to hurt my chances. Better experience is to be expert at Excel and its functions. To really separate yourself then knowing how to use Visual Basic is a big plus. Does a local university have access to a Bloomberg terminal?
Yours, in service,
Jason