I used a book by Howard Anton in AP Calc... I THINK this is the on
http://www.amazon.co.uk/exec/obidos/...629576-4431823
I've also used the Steward book mentioned in the post above, but I preferred the Anton book - though I did use them for very different parts of calculus.
I'd also recommend getting a TI-89 if your interested in math - very powerful calculator, it can get you an A on most any test you can use it on/can get you an 800 on the SAT math or SAT II math.