Comment: The publisher

(See in situ)

The publisher

The publisher is Amsco.
That would be one place to apply pressure even in districts that don't use this particular book but do use other Amsco books. If even just one school board wrote a letter expressing concern, and saying that inaccuracies like this raise concerns about using Amsco books, it would definitely get the publisher's attention.

Someone asked about tests that go with this. The Amsco site links to some tests used in New York, and here is the page for American History:
I looked at half a dozen and didn't see any RKBA questions.

The Amazon rating is still 4.3 / 5 stars. That's another place to apply pressure. Correction: it's dropped from 4.3 to 4.2 in the last few minutes. :-)