And do not even think about the semi-divine beings Butcher places as original skinwalkers. Eldritch Abomination is an euphemism for these guys.

It was stated that McGonagall retired somewhere after 2008 and before 2017.

In Terry Pratchett's pre-Discworld novel Strata, the Norse discovery of America stuck.

Leiv Eiriksson... discovered Vinland, more than three hundred years after the Battle of Haelcor had ended the third and last Remen Empire.

The big migration followed automatically. The Turks were again pushing west and north. Leiv's father, Eirik, was a shrewd salesman. His Greenland had turned out nowhere like as green as it had been in his imagination, but from Vinland Leiv had thoughtfully brought rich berries and wild grains. The Northmen went west again.

They leap-frogged colony after colony down the eastern seaboard, up into the base rugged lands around Tyker's Sea and down the Long Fjord into the Middle Seas. It was the landscape of their dreams. They called it Valhalla.

There were natives. But the newcomers were only half-hearted farmers -- underneath the agricultural veneer they thought bloody. Those tribes they couldn't out fight they out- thought. When they met the Objibwa Confederacy they made treaties. And they spread, and merged.

By all the theories it should have ended there. Neither the natives nor the invaders had the textbook kind of social dynamic that builds Remes. The Northmen should have become just another tribe, with blue eyes and fair hair.

The theories were wrong. Something latent in both races was sparked into fire. It was a big continent, and it was rich.

In short, 300 years after Leiv, a fleet arrived at the mouth of the Mediterranean. Most of the vessels were under sail although there were one or two, small, fast and inclined to blow up, that could move into the wind. The sails of the big ships bore the Great Eagle of Valhalla on a striped background alternating the colours of the sky, the snow and blood.

The Battle of Gibraltar was short. Europe had been through 200 years of stagnation.

There was no answer to cannon.

...there was a worn mound in the heart of Valhalla where the water from the five inland seas spilled over into the Long Fjord. Eirick's Beard, they called the water. Red Eric had been buried in the mound. It was a big tourist attraction.

We never set foot on Earth during the course of the book**. Pre-Disc Pterry loved sketching in worldbuilding.

hS

**Or do we? There's a certain... implication in Kin's plans at the end of the story that I only just noticed... hmm.

A friend pointed out to me that, as far as American slang goes, we normally don't make slang by stopping a word partway through? It tends to either be acronyms, words from another language that got slurred and changed, or something more or less unrelated that got associated with it at some point. For a really obvious comparison, television gets shortened to TV rather than calling it a tele. So I'd expect the term to be like, 'Enem' (N-M, no-magic) or somesuch.

Alternately, it could be whatever term the first large population of wizards to come to the country used, corrupted and mangled until it only halfway sounds like the original phrase. If Norwegian wizards were the first to start coming to America en masse, then the slang would be a weird version of whatever the Norwegians called their nonmagical people.

Why yes I do like to nitpick really inconsequential setting details!