Advice on SAT prep books.

<p>Hello everyone! I've been monitoring this forum for the whole guest, picking up good advices here and there but now I need emergency help from fellow students. </p>

<p>I've been preping with Barron's SAT 26 th edition book, which I found really useful, as I boosted my score from 1600(first test) to 1900(second test). Two other SAT books I have are Barron's writing and math book. So far I haven't studied math at all, scoring 670(I'll dedicate my time to this later), so I am confident, that Barron's s has enough excercises in two books.
So, my question:
I've got a friend, who comes back from U.S. and he can bring me as many books, as I want, so what books would you advise to buy?</p>

<p>I am buying Black book, Blue book and Direct Hist both volumes for sure. </p>

<p>What are other good books to increase my scores to get at least in 2100 range?</p>