Not with Calibre libraries. If you ever go back to using Calibre, I’m not sure how it will respond to having all of the files “messed up” in the wrong spot — th

Not with Calibre libraries. If you ever go back to using Calibre, I’m not sure how it will respond to having all of the files “messed up” in the wrong spot — the docs are quite clear that there is ONE way to store books. That said, the end goal is to have a native Citadel way to manage libraries and that WOULD support custom folder hierarchies.