Thanks everyone for the recommendations! Looks like I have some research to do but at least I have time since I won't need a new text until fall. I'm looking for something that maintains a secular backbone, but gives reference to different world religions because they are a strong driving force all throughout history. I prefer to put our own religious studies in myself. But at least I have some to research! I was hoping that Bauer and Wise had created a middle school series, but that's okay. :)