The Raven Warrior by Alice Borchardt

"Born of the Highlands, along Pictish shores washed by the icy North Sea, Guinevere, Queen of the Dragon People, has become a woman. She has taken the power offered to her by the Dragon Throne. Now there is no turning back. In order to protect her beloved homeland from the obscene greed of the Saxon raiders, Guinevere knows she must launch an attack. The sub-chiefs refuse to fall in line with her plans (because what does this young thing, barely a woman, know of warfare?) and give her an army of the useless, the outcast, the weakest of their young boys and girls. But the war party must proceed. If it fails, the command of both land and sea will fall to the enemy.Facing her first battle against the pirates on foreign shores, and backed only by a meager band of ill-equipped fighters, Guinevere calls upon the spirits of the dead to aid her in the attack. Diving into the dark, morbid depths, Guinevere suddenly understands more of hate, love, anger, and revenge than she has ever wanted to.