Gwelf: The Survival Guide (2021) is a gorgeous art book by Larry MacDougall who once upon a time did art for Palladium and Magic: The Gathering. I say it's an art book, because that's what Amazon likely calls it, but in the rpg world it could credibly be called a systemless setting book.
Gwelf is a Medieval(ish) land of anthropomorphic animals. Its author says it's like a cross between Wind in the Willows and Lord of the Rings and that's not just high concept, but pretty much literally the case. Gwelf is the last bit of civilization of the border. It's a place where Otters, Foxes, Badgers, and the sage Sparrows come together peacefully, but beyond the frontier are the Hinterlands where the Ravenfolk hold sway. They're practitioners of dark magic.
This book details the peoples and cultures of Gwelf. There's another book on the way in June, which promises to reveal more about the Hinterlands.