As I began writing, it was immediately clear that the original settings would need to be reconsidered. Devonshire is lovely and all, but this isn't Sense and Sensibility and Lake Monsters. (And yes, I know, there is a great Austen novel set on the water, but Persuasionisn't as ripe a target for satire as Sense and Sensibility. Also, Persuasion and Sea Monsters doesn't quite have the right ring to it.) In Austen's original, the Dashwoods, upon their disinheritance, are invited to live in what is essentially the guest house of a wealthy relation, Sir John Middleton. In my version, their move is to Pestilent Isle, part of a vast archipelago controlled by Sir John—now an elusive explorer/collector with a beard "as white as the snows of Kilimanjaro" and a necklace of human ears.
The long, central portion of Sense and Sensibility takes place in London, a bustling cosmopolitan capital in Austen's time as in ours. I needed to transfer that big hunk of story to a location that could represent all that London represented for the Dashwoods and also be beset on all sides by hideous sea monsters. My answer was Sub-Marine Station Beta, a great domed city planted on the floor of the ocean, "the greatest engineering triumph of human history since the Roman aqueducts."
(I had room to describe Sub-Marine Station Beta at considerable length, by the way, thanks to one significant difference between my book and Pride and Prejudice and Zombies. In that work, Grahame-Smith wrote 15 percent of the final text; the rest was Austen. The readers who gobbled up Zombies reported back to Quirk that as much as they loved the Jane Austen stuff, they wanted a little less of it. So my mandate on Sea Monsters was to deliver a book that was 60 percent Austen and 40 percent me. Which made my life easier: I don't know if you've ever tried to describe a city built entirely underwater, where wealthy Britons attend costume balls dressed as pirates and government scientists conduct ill-advised experiments whereby fish organs are transplanted into men, but it takes a few paragraphs.)
One of the most consistent creative challenges of writing the book was on the basic level of vocabulary. For the conceit to work, the new material would need to sound as much like Austen's marvelous and precise early-19th century diction as possible. So how to find the right vocab words to describe stuff that Austen never would have described in a million years? I borrowed a lot from my sources. From Verne, I got great fish-describing words like cartilaginous and bioluminescence. From Stevenson, great deserted-island words like miry and marish, not to mention nautical words like cockleshell and flying jib. I also turned frequently to the thesaurus. Poring through my Roget's, I arrived at the appropriately eloquent and disgusting phrase to describe the slimy stomach of an oversize hermit crab just before it smothers someone to death: mucocutaneous undercarriage.
Throughout this project, I found that Jane Austen and I collaborated best when I used the monsters and other interpolations not to replace but to accentuate what was already there in Austen's novel. She made Col. Brandon a bit too old for Marianne so she would have to struggle to see his goodness; all I did by giving him an octopus face was make her struggle a little harder. Whenever possible, I coordinated monster attacks with the moments of high emotional peril that Austen had already created—the Devonshire Fang-Beast pounces just as Elinor learns the truth of Edward Ferrars' past; Marianne's heartbreak at Willoughby's betrayal is heightened by the march of the death lobsters.
I will not hazard a guess as to whether Jane Austen is spinning in her grave over all this. I will say only that part of what makes her such a great novelist is how funny she is. Mr. Palmer trying to read the newspaper while his wife prattles on; Mrs. Jennings' endless gossip and insinuation; the vast gulf between Edward's mild ambition and his family's lofty plans for him: All of these story lines—and the sly sense of humor behind them—remain in the book she and I have written together. I've just made them a bit more mucocutaneous.