SAT subject test! Please answer.

<p>which books should i study for US History SAT
subject test?i want to get into Ivy league college.I am also taking math2,chem
and bio. Is US history
easy?
And what
score did you got? I didn't studied US History at school. So please suggest.
i heard that AMSCO
and Direct
Hits US History are
good to
prepare well for
subject test.
Should I buy both?
Should i
consider any other
book?i
wanna score a perfect
800. So
please help!</p>