<p>ok i am in a craphole right now. theres three days until the apchem test and i have not even bought a single prep book yet. so which ones do you guys recommend? barrons, kaplan, PR, or petersons'?</p>
<p>I have Barron's and PR. Barron's has a lot of extra information and considering the fact that you're running low on time, I'd get PR. Hope that helps.</p>