On Goodreads I use four mutually exclusive lists; the default three, and 'owned-unread', so that books I own but haven't yet read are visually distinguished from other books I want to read. I'd love if owned was just a property like a checkbox I could filter in/out within 'want to read' though, seems a lot cleaner. It was also super laborious to tag everything as owned - could you possibly implement something during import that maps a given Goodreads list to Hardcover's 'owned' list (or property)?