Need help with choosing right book!!!

<p>Yes, I'm a poor student. Right now, I can afford one physics, one math, and one chemistry prep books. So please tell me which one is best for each?</p>

<p>if you're lucky your library might have a few that you could use, or you could ask someone if you could borrow their old one
or you could buy some cheaper off of a site like amazon</p>

<p>i don't know specific books though because i didn't take those tests</p>