Honestly, I went on a whole wild goose chase for that one. It’s not on any of the mainstream platforms I checked—Kindle, Kobo, Apple Books—and the author’s site doesn’t have a direct PDF download either. I think the confusion is because 'The Arrangement' is such a common title, but the 'Galatea' version seems tied to the Galatea app itself, which is a serialized fiction platform. Their model is reading in-app, not distributing PDFs.
I ended up just downloading the Galatea app. It’s free, and the first chunk of the story is usually free too, which lets you see if it’s your thing. The whole PDF hunt felt a bit pointless after that; it’s really designed for phone reading with those tap-to-reveal segments. My library’s digital section didn’t have it either, which was a bummer. In the end, the app was the only legit spot I found.