I’m just going to say this once. If he-who-must-not-be-named had returned my first two Harry Potter books, then my Harry Potter set as a whole would share similar print edition information on the title page verso, and yes, as a Library and Information Science professor, having a set in its original entirety matters a great deal. Not having a full set is a material reminder of he-who-must-not-be-named; the otherwise reconciled losses of that relationship are literally inscribed upon my books.