Everything you need to understand or teach West of the Moon by Margi Preus.
Astri is the older daughter of a family. Her father is the younger twin and works the land owned by his older twin. Astri's mother dies soon after giving birth to Astri's younger sister, Greta. Her father soon leaves for America and is never heard from again. Astri and Greta go to live with her aunt, uncle, and cousins. Astri's aunt is cruel, putting everything she can toward the futures of...