The Lie Tree by Francis Hardinge
The family arrive off the boat on a stormy night to an isolated island community. Father is a noted scientist trying to outrun something that happened before they left home. Her mother is trying to keep up appearances and her little brother needs attention.
She suspects that her father is up to something so does some spying. He seems unbalanced and she is worried. She is smart in a world that doesn’t admire smart girls.
Tragic events unfold but Faith is smart and she stays strong. The social commentary is telling as the women of the family try to salvage a life for themselves.