Many of you will have seen this before, but I rather liked the Unsuggestor. It’s meant to be the opposite of the tool you see on Amazon and elsewhere that tells you which books are bought by people who bought a particular book. This tells you which pairs of books are not jointly owned. By the Amazon logic, if you like one, you’ll hate the other.
They have a list of books that don’t go well together on the side of the page. The top one is Kant’s Critique of Pure Reason and Sophie Kinsella’s Confessions of a Shopaholic. The third is Augustine’s Confessions and Sherrilyn Kenyon’s Night Pleasures. Here are some other pairings.
Austin, How to Do Things With Words – E. B. White, Charlotte’s Web
Descartes, Meditations on First Philosophy – Janet Evanovich, Two for the dough
Ryle, The Concept of Mind – David Sedaris, Me Talk Pretty One Day
Russell, History of Western Philosophy – Emma McLaughlin, The Nanny Diaries
Feel free to add more in comments!