B. M. Bower 
The Heritage of the Sioux [PDF ebook] 

This was another book written during the time Bower was involved with Hollywood. The story revolves around a Sioux woman who has been acting in the movies our friends of The Happy Family have been making. Jean of The Lazy A makes a cameo appearance, and various other characters from past books. 
But the story felt patched together instead of smooth: Annie-Many-Ponies has known the director since she was a child, she gets jealous when Jean shows up, she does a dangerous stunt to prove she is braver than the other actress, a bank robbery is needed for the movie, Mexicans are the bad guys, there is a ‘remake’ of the bank robbery scene, then a cross country chase by all the cowboys into the Navajo reservation, the Navajo are now the bad guys, and eventually we have a dramatic and somewhat unexpected ending scene.