You called out Creighton and then said that Leighanne was the first use of “eigh” not at the end. Otherwise super interesting!

I commonly notice typos in books. But then it might be mostly in romance novels, which at the rate they get churned out probably have a short editing cycle. Usually the typos I see are usage of the wrong word spelled correctly, e.g. they/their (though actually that one is rare, I just can’t call to mind a specific example right now). Have definitely seen such typos in fantasy and mystery novels as well.