The University of Nebraska Press edition of Horace Poolaw, Photographer of American Indian Identity was released June 2016.

The UNP listing is here: http://www.nebraskapress.unl.edu/product/Horace-Poolaw-Photographer-of-American-Indian-Mod,677134.aspx

Amazon also lists the book: https://www.amazon.com/Horace-Poolaw-Photographer-American-Modernity/dp/0803237855/ref=sr_1_2?ie=UTF8&qid=1485880902&sr=8-2&keywords=horace+poolaw