The Girl with the Hickory Heart

For Luna, the price of peace in a time of war is a heart of hickory. But to have a hickory heart leaves no room for love. When the lives of her three brothers are tied to refugee siblings from the warring tribe, Luna must test the limits of her wooden heart, trust those she's been taught to hate, and now she's destined to destroy.
In an island nation akin to a wooden Hong Kong, two Asian women from warring tribes: Lye, a powerful slave of the Emperor and Luna, a Char defying tradition, must put aside their pasts in order to move forward.