Dragontiarna: Defenders (Dragontiarna #6)

The realm of Andomhaim reels beneath the invasion of Warlord Agravhask, and Ridmark stands in his path.
Ridmark knows that Agravhask is only the servant of the mighty Warden of Urd Morlemoch, and the realm must be ready to face its true foe.
But the Warden knows that Ridmark can stop him, and has dispatched the Heralds of Ruin to slay the Shield Knight.

Third of Nightmane Forest has seen the trap, and rushes to save her friend.

If she fails, the Warden and his dark Heralds will triumph, and darkness will swallow the world...