The Citadel of Night (The Chronicles of Night) 1st edition

The war rages on. The Eternai have driven the Night from their lands after a costly battle in Verden. From his liberated throne, King Talon orders the Eternai war machine onto their new target; the shadowy and mysterious realm of Night. 16-year-old Jackson Taeric is assigned to Falcon's small expedition force. His mission is to carve a path to the Citadel while crippling the receding Night's defenses. In an impossible attempt to cross an uncharted country, Jackson battles alongside the Eternai through sunken caves, frozen mountains, and an enchanted forest...but his loyalty to the Eternai is called into question when he receives a letter inviting him to join the Night, written by the Mistress herself. Jackson discovers his forgotten past and is forced to reconsider his allegiance. Foreign allies disturb the tides of battle, and former friends reveal their true colors. As the Eternai close in on the Citadel, Jackson must decide; should he continue bearing the Eternai banner, or should he kill their king?