Ravenward

The war with Darkstriders entered the Kingdom of Axain. When the Feral Orcs attacked Nightfall Meadows, Thea the Loyal charged into battle alongside King Galin IV of Ravenward and his jealous fraternal twin Kade. When the first female knight of the kingdom slayed the Orc leader, Thea pledges to protect the king and his family against any aggressor, even his brother. Unknown to any of them, a dark menace hides in the shadows waiting for the right moment to strike and decapitate the noble family of Ravenward.

Ravenward is the first of several fantasy books in this series. It is located in the epic fantasy, Sword and sorcery, and ya fantasy categories.