My new Kindle has the ability to let me report typos and other content errors.
I've been using that feature A LOT. I've reported 13 content errors in the last month, and I'm not reading all that much, just a few hundred pages in that time.
When I asked about the feature on /r/kindle they said it had been around since the Paperwhite or so, yet books are still riddled with things that even a basic spell check would catch.
Amazon doesn't seem to be holding publisher's feet to the fire.