I'm reading this great book on Hawaiian mythology. It was written for academic reasons, but is plenty accessible for the layperson, because if you don't think that a book like that won't have some general appeal then you're maybe not cut out for a career in marketing. ;]
Seriously, though, it's rather engrossing stuff. None of it is grand epics, although some of the sources sound like they're long enough to be such, but instead it all intertwines with the culture and history of the region. That makes me wonder: maybe Greek mythology has been, how to but this, severed from it's ancient parent culture by it's constant study and re-packaging for the consumption of foreign audiences. Maybe in it's natural habitat, it was a lot like the rougher-edged Hawaiian mythology that I'm reading about now. Perhaps an untestable hypothesis on the face: unless I have a time machine, I won't be able to get the kind of secondary sources on Hellenistic mythos that I'm looking for to find out, exactly because of so many scholars through history clumsily trying to do just that.