So basically, I want to learn more about Zulu (or possibly some other South African culture) polytheism, among other things. Trouble is, it's hard to find a lot information about it, even from ye olde Google and some stub pages on Wikipedia. I can find some basic stuff, sure; but nothing really in-depth like you can find with even Slavic mythology. It's not clear if the small number of gods' names I'm finding is because they only had a handful of gods or because there's such scant information available. This sucks because I'm compiling information on a lot of mythologies for use in a novel some years down the road.
Obviously, a StackExchange board may not be the best place to ask about how to solve this problem, but I don't really know where to turn here. I'm also plagued by the fact that there's some other mythologies that aren't quite as hard to find information on (i.e. Inuit mythology), but which I still can't find a whole lot about. To clarify, I'm looking for definitive lists of all the most significant and/or widespread deities (as well as heroes and creatures) and noteworthy myths.
Thus, I turn to you guys to ask how I can most effectively look for detailed, reliable sources about mythologies that Wikipedia and the first 10 pages of Google won't help me out with. If there just isn't a lot of information available, then that's fine; but I at least need to know that there is, in fact, a straight answer to the question of whether I can find the information I want at all.