What books to use to study for DAT?! i'm using Kaplan right now...?

so i am getting ready to study for the DAT...i have my degree in biology. I have the Kaplan DAT book and I am using my notes from my lectures also to help aide in the studying process. is that good enough? i have heard so many mixed reviews on what books to buy and i don't wanna waste money on all these unnecessary books if they aren't needed. i'm pretty good with the bio, but the orgo chem may get it...so if there are any books specifically that are just geared towards the chem section that you all can suggest that would be great. also, is studying for about 2 months pretty good?