A Throne of Swans Series by Katharine Corr, Elizabeth Corr

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. Aderyn's ancestral bird is a swan. But she has not transformed for years, not since witnessing the death of her mother - ripped apart by hawks that have supposedly been extinct since the long-ago War of the Raptors... moreWhen 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. Aderyn's ancestral bird is a swan. But she has not transformed for years, not since witnessing the death of her mother - ripped apart by hawks that have supposedly been extinct since the long-ago War of the Raptors. With the benevolent shelter of her mother and her father now lost, Aderyn is at the mercy of her brutal uncle, the King, and his royal court. Driven by revenge and love, she must venture into the malevolent heart of the Citadel in order to seek the truth about the attack that so nearly destroyed her, to fight for the only home she has ever known and for the land she has vowed to protect. Written in rich detail and evocative language, this is the start of an irresistible, soaring duology about courage, broken loyalties and fighting for your place in the world. less

Three months after Aderyn's coronation the court is celebrating the Solstice, but Aderyn is preoccupied by Lucien's continuing hostility. The celebrations are interrupted by the arrival of nobles who have escaped from the neighbouring country of Celonia - the flightless have risen up and overthrown their rulers. The world is changing. As people being to question whether Aderyn and Aron are strong enough to rule, there is an attempted assassination on Aderyn's life... moreThree months after Aderyn's coronation the court is celebrating the Solstice, but Aderyn is preoccupied by Lucien's continuing hostility. The celebrations are interrupted by the arrival of nobles who have escaped from the neighbouring country of Celonia - the flightless have risen up and overthrown their rulers. The world is changing. As people being to question whether Aderyn and Aron are strong enough to rule, there is an attempted assassination on Aderyn's life. Siegfried and Tallis have made their move - they have formed an army, declared war and will take the throne, by any means necessary. Aderyn must fly to unchartered territories and risk the lives of everyone she loves to defeat her enemies, secure her throne and unite her people. Epic, dangerous and impossible to put down, this finale takes you on a soaring journey through grief, strength and determination to fight for what is right, what you love and what is yours. less