Books in the A Throne of Swans series

Three months after Aderyn's coronation the court is celebrating the Solstice, but Aderyn is preoccupied by Lucien's continuing hostility.

When her father dies just before her birthday, seventeen-year-old Aderyn inherits the role of Protector of Atratys, a dominion in a kingdom where nobles are able to transform at will into the bird that represents their family bloodline.