The unearthing of what seems to be the 14,000-year-old skeleton of a male Caucasian from an Oregon riverbank raises important cultural issues in Mitchell's latest book (after 2000's Spirit Sickness) about Bureau of Indian Affairs Investigator Emmett Parker and FBI Special Agent Anna Turnipseed, who are both part-Native American. Not only does the discovery go against most theories of when Caucasians arrived in the area, it also looks as though Native...