Goddess By Mistake — P.C. Cast

Shannon Parker, a young high school English teacher, purchases an ancient vase because it depicts a Celtic goddess who looks astonishingly like her. On the drive home, the vase releases a force that flings Shannon into Partholon, an alternate dimension in which everything Shannon knows as mythology - is reality. She finds she has exchanged places with the High Priestess Epona who, unfortunately, is a seriously evil not to mention totally oversexed person. In addition to performing Epona's bizarre rituals and struggling with her Beauty-and-the-Beast attraction to a handsome centaur, Shannon finds she must combat the Fomorians, a vampiric race of demonic humanoids. As Partholon readies for war, Shannon must use all her resources to survive in this strange new world. Not even ten years of dealing with teenagers in the classroom have prepared her for becoming a goddess by mistake.