Question about the books
I recently became aware that this anime is based on a light novel series, so I thought "great!" and went to Amazon to see if I could get the books. And I ended up pretty confused. Apparently there's the main light novel series, the "progressive" series, manga versions of both (and it's sometimes hard to distinguish which ones are the novels and which are the manga), and possibly other things. More confusing is that they all seem to overlap and I can't figure out the correct chronological order to get the books in. Apparently some of the books are "side stories".
So i'm just wondering, is there any kind of actual order in which one should get these books, and if so, how much of an order is it and do the "progressive" novels and "side stories" stand alone or what? Should one read the main light novel series first, and then read the "progressive" series and the "side stories" after that, or should they be read in between different volumes of the main light novel series, or what?