There are excellent nonfiction books about Apache and the Apache culture, and specifically the Chiricahua Apache.  See the Bibliography in Return of the Blue Mountain People for a complete list.

 

Of interest in regard to the novel Return of the Blue Mountain People, foremost are:

 

I Fought With Geronimo by Jason Betzinez, the only known book authored by an Apache who participated in the last battles of the Apache Wars.

 

Wisdom Sits In Places by Keith Basso explains and analizes the successful Apache method of travel across unknown territories. 

 

The ethnologist Grenville Goodwin's early research into Apache culture and language (The Social Organization of the Western Apache, and others) is augmented with modern developments in Like a Brother:  Grenville Goodwin's Apache Years, 1928 - 1939 and The Apache Diaries: A Father- Son Journey by his son Neil Goodwin; and expand understanding of the last great clash between Native America and the modern world.  

   

Indeh and In the Days of Victorio, books by Eve Ball, are based on Apache oral testimony, revealing Native American historical perspectives.