In my search for a tool that would do for all eBook formats, what ComicRack does for e-comics, I came across Calibre. I’m using is for now since it’s the best I came across so far, but honestly it doesn’t make me as excited as ComicRack. It does create you a library, but no lists or folders. And there are a lot of nice options in there that simply get lost in the short comings of the UI… but oh well, it’s more or less a nice tool and it’s open source, so… going to keep using it for now. =)