Caged by Lena Mae Hill

The moment someone discovers Astrid’s life, they’ll take it.
That’s why she must stay locked inside an abandoned lighthouse where no one except her mother knows of her existence. If anyone found out about the girl whose tears turn to gold when they fall, they would enslave her in a life of misery, forcing her to cry while they grew rich.
That’s what Mother Dear has always told her.
When she sees four boys burying seeds at the base of her lighthouse, she hides like her mother instructs. But when vines begin to grow up the wall like magic, she knows her time is limited. After all, what guy wouldn’t climb them to peek inside the mysterious tower with no doors?
Astrid must decide whether the real evil lurks in the outsiders or within the walls of her own tower…before Mother Dear finds out that someone is trying to steal her golden goose.