The idea for Goblin Fruit was actually the first idea for the series. Long story short, it came out a fannish project where we were coming up with books and works that might have been read.
I have loved the Dorothy L. Sayers Lord Peter Wimsey books since I first read them (sometime in my early teens), and Lord Geoffrey Carillon is very much meant to be cut from a similar cloth as Wimsey.
They’re both intelligent men who underplay their brains to be more effective investigators in varied social circles, and they’re both younger sons of respected noble families. And they both had a bad war that included some amount of intelligence work in the midst or aftermath. But Carillon has inherited the title (and its obligations), and had to return from his explorations abroad to take over his duties. That, naturally, includes finding someone to marry so there is a next generation.
I’m also fascinated by Christina Gabriel Rosetti’s famous poem, “Goblin Fruit” about two sisters, one of whom tastes the food and drink of the trooping goblins and is enchanted, saved by her sister’s loyalty. That formed the core of the plot for this book, figuring out what kind of magical temptation would be there, and how Lizzie and Laura would deal with it.
I wanted to talk about tuberculosis. I knew from the beginning that part of the reason Lizzie was so protective of her younger sister was because Laura had been in poor health for most of her adult life so far. The more I thought about it, the more tuberculosis – still a very present threat in the 1920s before the discovery of antibiotics – was the thing I needed to talk about. I love how that plays into part of the solution of this book (skills that Laura learned from long years in sanitariums and dealing with medical staff) and how it plays out in Laura’s own book, In The Cards.
Other bits of worldbuilding: This was also an excuse to explore non-human magical beings (there is more of that to come, in various ways), and I loved the idea of exploring a magical costume party. (The women dressed as Upper and Lower Egypt may well make a further appearance down the road…)