River Marked2011
by Patricia Briggs
Car mechanic and shapeshifter Mercy Thompson has never known any others of her kind. Until now. As Mercy comes to terms with this new information, an evil is stirring in the depths of the Columbia River--and if Mercy and her mate, the Alpha werewolf Adam, are to have any hope of surviving, they will need all the resources the shifters can offer.
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5 editions at OpenLibrary