The first part of a new YA fantasy duology, loosely inspired by Swan Lake.

When her father dies just before her eighteenth birthday, Aderyn inherites the role of Protector of Atratys, a dominion in a kingdom where nobles can transform into birds. Aderyn's ancestral bird is a swan. But she has not been able to transform for years, not since witnessing the brutal death of her mother. Aderyn must venture into the malevolent heart of the Citadel in order to seek the truth about the attack that killed her mother and to fight for the land she has vowed to protect.