relativism

I'm planning on buying one of the following apologetics books because they discuss various different subjects that are contemporary. However, I don't know which one of the two to get. Has any one read one of them or would anyone like to give an opinion on them to help me decide which one to buy...

On my online Anthropology of Religion class, we will discuss and debate ethnocentrism and cultural relativism and the difference between the two. By the way, those who responded to my last post on Anthropology of Religion helped me greatly. I already exposed the limits of the scientific method...

One of the things I see being thrown around the blogosphere is the idea that postmodernism isn't relativism at all. It seems the Emergents have caught on to this argument and are beginning to move away from that thought, combating it and claiming that postmodernism is anything but relativistic...