Skull’s Vengeance (Curse of Clansmen and Kings Book 4) By Linnea Tanner – Goddess Fish Promotions. GENRE: Historical Fantasy. A Celtic warrior queen must do the impossible—defeat her sorcerer half-brother and claim the throne. But to do so, she must learn how to strike vengeance from her father’s skull. Ultimately, in order to defeat Marrock, Catrin must align herself with a dark druidess and learn how to summon forces from skulls to exact vengeance. But can she and Marcellus outmaneuver political enemies from Rome and Britannia in their quest to vanquish Marrock?