This is part of the Tales from Forgotten Gods Collection. Each book is a stand alone story of an ancient God who is...well...forgotten.
It has been decades since the Gods of the old America's have been needed, or called on, so when Coyote gets word that someone is not only posing as her, but posing as skinwalkers as well, and they are committing horrors in her name, she has to go and investigate. With her friend Crow at her side, she has to find out what is happening to all these missing women, but as the God of Mischief of course she needs to create a little chaos at the same time.