Hi, I’m looking for a book I read when I was younger.  It might be a young adult book, but it might be a regular grown up book too.  I don’t remember a ton about it, but I do remember this cottage being covered in shells.  Or maybe it was just some rooms within the cottage.  A girl, maybe she was sick, is possibly hiding there after recently discovering it.  I think as she feels better she works on cleaning and restoring it?  If this is enough for anyone out there to tell me the name of the book I’d be forever grateful!