A Crane Among Wolves by June Hur
In 1500s Joseon (modern day Korea), Iseul and her sister are living under a brutal tyrant, King Yeonsan. The king has murdered all those he considers political enemies, which included their parents. The King commandeers land from his people and kidnaps young girls across the country. When Iseul's sister becomes one of the kidnapped girls, Iseul embarks on a dangerous journey, determined to bring her home. She believes the key to getting her sister back is to solve a series of murders the King has offered a great reward for.