From what most people say on this forum it seems to me that 8 Manhattan Strategy Guides are the best prep books. You would have to go over them and then start studying from the OG 12th
Edition. For your information, if you are planning on getting a high score (700 or more) it might be very challenging for you to get it in only two months. Naturally, it is possible and there are people who did it. I know that I won't be trying to take the GMAT with anything less than 3 months of preparation.
You can find descriptions of prep books on this forum, one of those top threads under GMAT Strategies, I think, if you want to get a better insight.
Hope it helps and good luck!
Set your aims high, carpe diem