Heliacle Rising (The Wytchling Chronicles Book 1) by C.C. Davie

Taken in as the young ward of Lord Drakon after her parents were slaughtered by enemy Wytchlings, Amylia Sylvers is forced to start a new life in Lylican. There, she is raised to be an obedient wife and submit to the men who have given her sanctuary.

Eleven years later, Amylia is betrothed to Lord Drakon's son to secure a strong alliance between the last human-held territories, but she struggles to accept the life that has been forced upon her. 

With the threat of war with the Wytchlings of Attica looming from across the sea, a meeting is called between the territories of Labrynth to discuss an alliance. The magic-wielding Wytchlings of Asteryn arrive, determined to bring the territories together, but soon expose a perilous secret from Amylia's past that changes everything. 

In a move that endangers the desperate territories further, Amylia must travel to Asteryn, where she finds love but ignites a war that could mean the end for them all.