Hey guys! I'm sure this has been asked before, and I hope not so much as to warrant a "use search function!" but my time is somewhat limited. I'm starting university up again soon and I've been debating between psychology and astrophysics/astronomy. The problem is, my math is lacking -- just slightly -- maybe. The question I have is, what books would any of you suggest? I want to get more of a grasp on the subject's base... that is, a good book I wouldn't have to have my PhD to understand, but would give me a taste of what the subject is like before I walk into my counselor's office to change my major. Thanks in advance for your help!