Dear Rajeshwari ,

There are lots of Economics  books published for B.Com (//B.Com) first year by the different publisher and mostly every college followed different books according to syllabus .So it will very difficult to share a particular books name or pdf with you without proper information .

But you can refer one or two books simultaneously for better clarification and every books having wrote in different manner like some of books use  very high levels of words and some of books are used easy words .

So always choose books as per your interest or which you feel good .

Hope it will helpful

Thanks