Lake people : a novel / Abi Maxwell.

Enhanced descriptions from Syndetics:

A haunting, luminous debut novel set in a small New Hampshire town: the story of the crisscrossing of lives, within and without family, and of one woman, given up for adoption as a baby, searching for the truth about her life.

As an infant, Alice Thorton was discovered in Kettleborough, New Hampshire, in a boathouse by the lake; adopted by a young, childless couple; raised with no knowledge of the women who came before her: Eleonora, who brought her family to Bear Island, the nearly uninhabitable scrap of land in Kettleborough's lake; Signe, the maiden aunt who nearly drowned in the lake, ashamed of her heart; Sophie, the grandmother who turned a blind eye to her unwanted granddaughter. Alice grows up aching for an acceptance she can't quite imagine, trying to find it first with an older man, then with one who can't love her back, and finally in the love she feels for one she has never met. And all the while she feels a mysterious pull to the lake. As Alice edges ever closer to her past, Lake People beautifully evokes the interweaving of family history and individual fate, and the intangible connections we feel to the place where we were born.