The Spirit Woman (Wind River Reservation Series #6) in Bloomington, MN

According to legend, Sacajawea
—
the Native American woman who helped guide the Lewis and Clark expedition through the American wilderness
is buried on the Wind River Reservation. Now, a college professor
and longtime friend of Arapaho attorney Vicky Holden
has disappeared while seeking the truth behind the legend.
Vicky and Father John O’Malley soon discover that her missing friend is linked to another female historian who also vanished on the reservation
while researching Sacajawea twenty years ago. The answer to the mystery of the missing scholars may lie in the pages of Sacajawea’s hidden memoirs
and with a culprit who will do anything to ensure they’re never found…