I decided to give it a try, and I came up with three pretty good equations, and I wrote a bit of an explanation for each of them. This is much simpler (and much more fun) than actual math.
Miss Peregrine's Home for Peculiar Children + A Death-Struck Year = In the Shadow of Blackbirds
- Miss Peregrine's Home for Peculiar Children - creepy historical fiction with photos throughout the book. The photos in Miss Peregrine's are a bit more directly related to the plot, but they're important in both books.
- A Death-Struck Year - the setting (the West Coast of the U.S. during the Spanish Influenza), and a main character who wants to help others.
We Were Liars + A Madness So Discreet + The Darkest Part of the Forest + The Raven Boys = The Accident Season
- We Were Liars - solving a mystery that doesn't even feel like a mystery in the first place. Clues are slowly revealed, but nothing substantial, and you probably won't know what's actually happening until the last few chapters.
- A Madness So Discreet - something that I can't reveal because MAJOR SPOILERS FOR BOTH BOOKS. But also the general creepiness.
- The Darkest Part of the Forest - the blend of paranormal/fantasy and contemporary, and the overall tone. An ordinary setting where extraordinary things don't feel quite so extraordinary.
- The Raven Boys - again, the blend of paranormal and contemporary, but also the core group of main characters being a fascinating group of friends. Each person has their own story.
- Harry Potter and the Deathly Hallows - a Chosen One's final year at (or not at) a wizarding school. In any case, his final adventure.
- Harry Potter and the Order of the Phoenix - a ton of other things about Harry Potter. This could have really been any Harry Potter book. Sure, there's parts of Carry On that are a lot like earlier Harry Potter books, especially the school, but let this one represent all the super-dark things that come with Harry Potter.
- Twilight - vampires and weird obsession before a romantic relationship. Seriously.
- Simon vs. the Homo Sapiens Agenda - clueless, gay protagonists named Simon. And a bit of sweetness.
What are some of your book math equations? What about different equations for the same book? How would you add more complex math into this? Tell me in the comments!