Gold River by Suellen Ocean

Natasha sees a chance to start over when she meets Casey and moves with him to Gold River, a quirky little village in the Sierras where Casey grew up. When her troubled younger sister, Michelle, follows her there and becomes involved with Casey's handsome and mysterious Native-American friend, Hank, Natasha hopes for the best. But it doesn't take long for Michelle to return to her manipulative ways with men. Casey is coming home late and behaving suspiciously. A strange man is stalking Natasha's family. The local college has been robbed of priceless Native American artifacts. Is Natasha's dream about to turn into a nightmare?