While a more proper place for this thread would, in some respects, be OoTw, I feel that because this forum is so underused (and because my query relates specifically to Japan), here is as good a place as any to put it. I'm looking for an in depth and accurate primer on Japanese aesthetic concepts such as wabi, sabi, aware, and yugen. I've read conflicting definitions of these words, especially the first two, and I can't seem to find a trustworthy looking article that goes into detail about any of them.
A search on Barnes and Noble abounded with books that had "Wabi-Sabi" in the title, but many seemed like they might be commercializations and overgeneralizations for a dumb American audience. Any help would be vastly appreciated, as I'm eager to understand the true nature of these concepts.