Cloak of Darkness( return of vesna book 1)

After the queen of light was slain, king Soldar, the dark Fae declared dominion over the realms including the five human kingdoms. But there is a prophesy you see, one that foretells his destruction by a Fae. Distracted by the need to hunt down the harbinger of his doom, he ignores the human kingdoms leaving them alone to conduct their business as usual.
Of the five human kingdoms the strongest demesne is the Kingdom of Pretoria. Ruled by the benevolent king Silas, they are preparing to host the annual royal games when his son Prince Byron spies a young boy Darren who has come of age to join the royal army. Evaline, Darren's ever protective sister volunteers to accompany her young brother becoming the first female to ever join the Pretorian royal army.
Despite protests from her friend Caspian, the half brother the prince, his mother Jutu, her best friend Havah and the chatelaine Eve, Evaline is determined to protect her brother at all costs. This is the story of a determined young lady to battle court intrigue, and the specter of the dark Fae lurking in the shadows.

Fans of Sarah J. Maas and Audrey Grey will enjoy this first installment of Return of Vesna Series.