<p>Don’t listen to howon92. Gruber’s is the best book for the math section, period. Nobody uses it for W and CR anyways, as RR and Grammatix are much better for those sections, respectively. The way they categorize the math problems and the way they explain it is perfect for the math section. As long as you use it correctly, it will be a great asset. Trust me, it improved me from a 650ish to a 800.</p>