They have to be related. Seriously.
PS - I borrowed OPHELIA from the local library near my new home, which I checked out for the first time around Christmas. I want to take this moment to thank the amazing buyer for this library because the YA section is actually a giant section and looks more like a Barnes and Noble of current releases and less like one paltry shelf of outdated books. I am giddy. Do you have an awesome local library? Share the love!