Not a sister comm, right here. For the most part, the only difference between the two challenges is the unit of counting: in the books challenge members count entire anthologies and collections; in the short-works challenge members count individual works in those same anthologies and collections. Far, far more overlap than difference.

:: (These stories were collected by white anthropologists but as best I can tell, they were taking dictation from the Native American persons being interviewed - I hope that's okay.) ::

They're within the comm's scope, yes.

Which isn't to say that the audience isn't going to affect what is said, sometimes greatly. (And that's even assuming that you've decided that the person taking down the story is trustworthy.) The same problem exists with most FWP ex-slave narratives, too.