Car mechanic and shapeshifter Mercy Thompson senses that an evil is stirring in the depths of the Columbia River--one that her father's people may know something about. And to have any hope of surviving, Mercy and her mate, the Alpha werewolf Adam, will need their help.

Car mechanic and shapeshifter Mercy Thompson senses that an evil is stirring in the depths of the Columbia River--one that her father's people may know something about. And to have any hope of surviving, Mercy and her mate, the Alpha werewolf Adam, will need their help.

In the sixth novel in the #1 New York Times * bestselling series, coyote shifter Mercy Thompson and Alpha werewolf Adam finally reach the alter. But when they make the Columbia River their honeymoon destination, their newlywed bliss turns into a fight for survival...*

Being a different breed of shapeshifter--a walker--Mercy can see ghosts, but the spirit of her long-gone father has never visited her. Until now. An evil is stirring in the depths of the Columbia River--and innocent people are dying. As other walkers make their presence known to Mercy, she must reconnect with her heritage to exorcise the world of the legend known as the river devil.