I’ve been building a book about a detective who believes everything has a rational explanation, and I’ve dropped him into a world where magic is real on the first page.

The detective is the Scarecrow. That’s the joke underneath the whole thing — he isn’t an outsider who wanders into Oz skeptical of it. He’s a native. But at the end of the story we all know, the Scarecrow got his brain, and ever since he’s leaned hard into it, becoming the most rigorously logical mind in a land that runs on enchantment. He’s the one figure in Oz actively trying to reason the magic away. His Watson — the one telling the story — is the Tin Man, which feels right, because who better to narrate a tale about the head and the heart than the man who went looking for one of them.

It’s called A Scandal in Emerald, and if that rings a bell, it should. I built it on the bones of A Scandal in Bohemia — the one Sherlock Holmes story where somebody finally out-thinks Holmes. That somebody was Irene Adler, and in my version she’s Dorothy. Not the little girl who wanted to go home. A grown woman who, it turns out, never lost the silver shoes over the desert the way the old books say she did. She kept them. She’s been slipping between Kansas and Oz for years, gathering what she knows, and when she reappears she looks for all the world like the villain of the piece — while she’s quietly trying to save Oz all over again.

So that’s the setup. Here’s the part I actually care about.

When the magic breaks his rules, the Scarecrow does what a mind like his always does: he gets annoyed. He needs an answer. He keeps trying to force the enchantment back into something logical, and when he can’t, it frustrates him to no end. He’s built to reduce the world to explanations, and the world won’t cooperate.

And then he starts to find that the magic has rules.

I don’t have every beat of this worked out yet — I’m still in the outline and the world bible. But the idea driving it is one I believe outside the book entirely. Somebody standing two hundred years ago would look at the world we live in now and call it magic, top to bottom. It isn’t. It’s science finally catching up to what people used to only imagine. Even in Oz, half of what everyone called magic was the Wizard behind a curtain, working the levers. The real work is finding the line: what’s genuinely wondrous, and what only looked like magic until somebody understood how it worked.

Here’s what surprised me about my own detective. Finding the rules doesn’t ruin the magic for him. It makes him love it.

That cuts against the thing everybody assumes — that understanding kills wonder, that the magician who explains the trick has murdered it. But a mind like his doesn’t run on mystery. It runs on curiosity. Take away the puzzle and he goes restless and hollow; he needs something to figure out or the engine turns on itself. So the last thing he wants is for the magic to stay unknowable. He wants to know how it works — and once he does, two things happen at once. He appreciates it more, not less. And he can finally use it, because anything you truly understand becomes something you can put to work.

We’ve got our own magic now. Tools that make the impossible look effortless, that dazzle some people and frighten others. You can stand in front of that and feel small, or you can do what the Scarecrow does and go looking for the rules. Almost everything is learnable, at least far enough to stop being afraid of it. A little reading, a little discernment, and most of the curtain comes down.

That’s the thing I’m really writing about, underneath a mystery in a green city. Not how to escape into a world of magic. How to stretch our minds enough to meet the world we’re actually in — instead of the one we wish we’d been handed.