The Demon Catchers of Milan (Demon Catchers of Milan - Trilogy)

Mia’s ordinary life is disrupted for good in the most horrifying way possible when she is possessed by a hungry and powerful demon—and  saved only by the arrival of relatives from Italy, the country her grandfather fled many decades ago. Now her cousins, the charming and gorgeous Emilio and stern, elderly Giuliano, say the only way to keep Mia safe is for her to come back with them to Milan, to live, to learn Italian, to fall in and out of love, and to master the family trade: fighting all demons with the ancient lore of bell, book, and candle. Milan is not what Mia expected, but it will change her forever.