Ann Rinaldi's LEIGH ANN'S CIVIL WAR
I think the reviewer at Kirkus (their reviews are unsigned) is dead-on:
“I have the gift of hoodoo because I am half Indian. Do you want to know about it?”
Comment: This isn't just faux-Indian mysticism. It's a whole set of stereotypes, both mystical and mundane.
Rinaldi could say she was just writing what people thought at the time. Pa apparently grew up with the Cherokee in Georgia and had children with one of them. Because he had personal contact with Indians, he'd talk about them more realistically. And he'd teach his children more than stereotypes about "hoodoo" and magical powers.
For more on the subject, see The Best Indian Books.