El Bebedor de Lágrimas

They say that, a hundred years or so ago, a girl who had been promised in marriage was deceived by a false lover. They say, too, that her tears brought her a genuine suitor, who avenged the outrage. And they say that, since then, the Drinker of Tears wanders around with his sword, waiting to avenge every girl who is deceived.
That is what they say…though at eighteen Adela does not believe in ghosts. Newly arrived at the university of Cornwall, she is happy and wants to take control of her life. But death hovers like a nightmare over the campus and brings the echo of a strange curse.
First volume of  a "crossover" trilogy.