Planning on a gmat re-take in a few months. My last score was 700 with quant 77% and verbal 93%. There are plenty of good quant stuff out there; i'm focusing on jeff sackmann's total gmat math and will get to his 1,000 question set later. For verbal though, aside from MGMAT's sentence correction guide, there don't seem to be that many good books for those wanting to hit that 99% mark. Any suggestions?

Thanks.