<p>Biology:
1. Cliffs: The best there is, the best there was... the best there ever will be? Well, maybe, but it's outdated a bit. Is it a bad thing? Not really, but new appearences, such as genetic engineering, and information about new things won't be on. But chances are rare, because collegeboard knows everyone reads this.
2. Barron's: Man, some text is just a duplicate of Cliffs. Check the virus section. Anyways, this is basically a toned up version of cliffs. Has more info, has historical information and up to date.
3. 5 Steps to a 5: This is good too. Good strong review. Not as popular as others, but it's still good. Practice test is pretty straight forward.
4. Kaplan's: Under rated. Maybe because this book has good information on things that do not concern the test. Still good, though.</p>
<p>In my opinion, get cliffs or barron's. If you can't find those, get either Kaplan's or 5 steps to a 5. All are generally good.</p>
<p>Calculus:
1. Peterson's: Just a funny book that teaches you calculus. Good review too. The only thing that I don't like about it is the questions they asked for chapter reviews. Sure, they are interesting and funny, but I'd rather have questions that are like on the AP exam rather than doing questions that involve actors.
2. Princeton Review: You can learn stuff from this too, but it's more of a review. Not bad I guess. Kind of confusing if you're studying AB, because the topics are scattered.</p>
<p>So I guess it's best to go with whatever you feel like. If you feel that you have lots of time and want to have a nice read while learning, go with peterson's.</p>
<p>Chemistry:
1. Peterson's: Best book hands down. People complained that there are many mistakes in this, but as far as I know the latest one has most of these corrected. This is loaded with relevant information for the AP test, and basically you can learn everything from this. Great review chapters and review questions. Study this whole thing, definitely an easy 5.
2. Princeton Review: Strictly review. Do not think you can learn things from this, you probably won't be able to. It's not bad, but one thing I don't like are the easy questions and the chapter pages. If you check the equilibrium section, they ask basic Kc problems, maybe like one problem that requires ICE and is so simple. In the chapter pages, they just state a few sentences, give you an equation, and that's it. Hess's Law is an average topic in AP Chem and they give you one sentence on it! But nonetheless, still a good book, good practice tests.
3. Barron's: Too much information. Many errors. Hard tests. If you like learning a lot, fixing errors, and getting hard tests, this is fine. Let this be the last resort though.</p>
<p>So, get the peterson's if you can. If you're running late on AP Chem, and just need a review, use the Princeton Review.</p>
<p>Haven't really done physics, but:
Physics B: Princeton Review: Good overall review, and teaches a bit too.
Physics C: Barron's: Fully dedicated to physics C.</p>