dajava wrote:
I have only one chess book, which covers all the aspects of the game

Now, I want to buy a chess opening book for the first time in my life.

I am a very low level player as you can guess.

Any recommendations?
There are many good introductory "repertoire" books available--these are
books that give you enough information that you can get going, without
getting bogged down in variations you won't understand for years, if
ever. They generally have titles like "Winning with..." or something
like that. For players in the lower classes, they are definitely enough
to get you going. The only problem is that you need to have some idea
of the sort of openings you would like before you buy the books.

A good, more general choice is Edmar Mednis's *How to Play Good Opening
Moves*. It will give you a range of lightly annotated openings from a
variety of systems to help you get an idea of how to control the centre,
castle safely, develop your pieces, etc.

If your local library has a copy of Reuben Fine's *The Ideas behind the
Chess Openings* you should get it. (Or buy it; it's cheap these days.)
It is well behind the times in much of its theory, but it will give
you very important basic information. For example, most beginners who
open 1. e4 are not looking to play d4 quickly. But it is often a very
important move, and Fine explains why.

Good luck

John