Places in the Dark — Thomas H. Cook

It is autumn 1937 when a mystery woman appears in Port Alma, a sea village nestled on the chilly coast of Maine. A fragile, green-eyed beauty, the woman arrives with little more than the clothes on her back and a wealth of unspoken secrets. Before a year goes by, she will flee Port Alma on the same bus that brought her there. But before she goes, she will irrevocably alter the lives of two brothers -- leaving one dead, and the other perched on the edge of madness.

There is much that Dora March has hidden.

But in Port Alma, Maine, there are other secrets, too....