Dark Earth

Isla has a secret: she has learned her father's sophisticated sword-making skills at a time when even entering a forge is forbidden to women. Her sister, Blue, has a secret, too: at low tide on the night of each new moon, she visits the bones of the mud woman, drowned by the elders of her tribe who wanted to make a lesson of someone who wouldn't hold her tongue. When the local Seax overlord discovers Isla's secret there is nowhere for the sisters to hide, except across the water to the walled