The Red Witch of Tirdonne — Miranda Mayer

After the death of her husband, Evvie of Ravensroost returns home embittered by her unfortunate marriage and determined to cut herself off from society. But when a rugged Bask warrior darkens her doorway, Evvie's world is turned upside down. Impulsively, she leaves everything behind for an icy, foreign nation where she has no friends or connections -- other than her Bask warrior -- and where everyone thinks she's a witch, a legacy she's reluctant to accept. She discovers this new identity comes with a mysterious, deadly and vengeful enemy. Armed only with knowledge gleaned from books and with the overzealous assistance of her new eccentric aunts and a particularly helpful librarian, Evvie must confront her witchly nature before her legacy destroys her.