Verbal is obviously your weak point, and you can tell that from your score and from a few grammar mistakes you made in your post. But fear not! There's always room for improvement. My advice is to not only read, but also carefully analyze each section of the two books that you've mentioned. They're both highly recommended on this forum, so you can safely say that you're on the right track. You could also improve your grammar by buying a text book and your reading by using various high quality materials such as The Economist, Wall Street Journal and so on.

If you feel you can't finish in time, then you need to take some more practice tests to work on your stamina. The GMAT is sort of like the marathon: you do need to train intensively for it, or else you'll run out of energy pretty soon.