The Blue Maiden by Anna Noyes

1825, generations since the women of Berggrund Island stood accused of witchcraft, many of them put to death.

But the shadow of this violent past looms large over the isolated community. Now, the island is overseen by Pastor Silas, a widower with two wild daughters, Beata and Ulrika.

The sisters are outcasts: imaginative, rebellious, and consumed by a curiosity about their home's dark history and the mother they lost. When an enigmatic outsider arrives at their door, his presence threatens their family bond and unearths a buried history to shocking ends...