What's the best SATI prep book for someone who already has a reasonably high score?

<p>i got the exact same score as you guys. I got a 760 Verbal and a 650 Math. I'll probably get a 780-800 on the Vebal and a 750+ on the Writing, so all that i'm worried about as of now is the Math. I'm not bad in math but the thing is i take my time on the easy ones, and once i get to the medium ones i realize that i'm going to slow and i speed up and make stupid mistakes. That's why i got a 650 on the January SAT. Only 2 questions i missed were of difficulty 5, most of them were 2 and 3 and due to stupid mistakes. SO, im just gonna do the practice tests in the Official SAT study guide so i can get used to the math.</p>