thanks for the advice. maybe I will get the book so that I can get some more knowledge. I have do all my pre-requisites except one sociology oh yes and I don't need to do chemistry but im going to do that with the lab incase I need it and I just have it on my belt. yes, I for sure wont spend a lot in it but so far in the schools im trying to apply in California area do have that class as their first semester so I think it would help not sure which one to get for a good study material but im going with my gut feeling on researching for the right one and I will be going to library and used book, I don't need a knew one for sure. thanks again for your time.