Hi Thonk02,

Great question! I'm glad you're on top of things, as this suggests that you're preparing thoroughly for the GMAT.

ManhattanGMAT is also aware of the change and we're doing everything in our power to make sure that our materials are updated in an accurate and timely manner. We are planning to update all of our curriculum, including the question grids in the back of each book, within 4 - 6 weeks of the 12th edition being released. Then, the updated version of our books should hit store shelves about a 4 - 6 weeks after that.

Needless to say, if you have purchased a Third Edition Strategy guide already, we will make sure that you receive an updated question grid that matches with the new 12th edition.

I hope this helps. Let me know if you need anything else.

Best,