Book Display: When you have no idea what to do...

Sometimes I get stuck in what to display on my hallway shelf. It sits by itself, away from the rest of the books. I've used it before for things like Readbox and Blind Date with a Book, but have been stumped the last few months with what to do with it.

I don't remember where I first saw the idea to display books based on their color, but it came to mind with St. Patrick's Day (and March Madness, with my alma mater making it to the Elite Eight...). I featured the color green for a few weeks, and just recently changed it to yellow -- makes me think of sunshine and spring, which is sure having a rough time arriving in Michigan this year.