Ok, these are the books I have used and the ones I'd actually recommend:
AP US History -
PR is good if you get through all of it
AP Macroeconomics -
PR is the best, DONT use CliffsAP (It's horrible)
AP US Government - CliffsAP, it's very complete and has good practice tests
AP Psychology - Barrons, the best prep book I've ever seen
AP English Language - you can't really study, but Master the AP EL exam is good
AP Latin - REA, it's the only real book, also excelability in advanced Latin, since Vergil is the only test left get the Vergil Workbook (those are absolutely awesome)
Just my opinion...