SAT II USH (Please Help!)

I’ve heard AMSCO and REA Crash Course are all you need. I haven’t learned a thing in class.

What do you guys think?

Also, are these the links to each one of them?

AMSCO: http://ma.lvlhs.org/ourpages/auto/2012/4/12/58446259/TOP%20REVIEW%20TEXTBOOK.pdf
REA: https://www.killeenisd.org/teacherDocs/c2/e24908/documents/APCrashCourseBook-125870.pdf

Bump

I used AMSCO and it helped me a lot. I think that’s the correct link! (I bought the book)
I would also recommend using the Sparknotes US History guide as well. I read this the night before and it helped me score 790: http://www.sparknotes.com/testprep/books/sat2/history/