Here's one for consideration:
- Shakespeare Is Everywhere--books that relate in some way to Shakespeare.
And possible titles for already mentioned ideas:
- Best Served Cold--books about revenge (as in "Revenge is a dish best served cold"); I suppose it could also include books about food, winter, the Arctic, etc.
***ETA: Vengeance Is Mine is better, I think. It would keep the focus on revenge.
- This Means War--books about war and conflict.