Books on the paranormal/occult/witchcraft?

I'm an anthropology student and I've always had a fascination with these fields of study. I'd like to learn a bit more about them on my free time, but form credible sources. Just for clarification, I do not consider psychics, mediums, or self-proclaimed field experts with no actual scientific credibility to be legitimate sources. I'd like to read more about genuine scientific inquiries into these types of phenomena if there is any such thing that exists. I've had a hard time finding these books on my own, so I'm turning to you guys to give me some suggestions.