Gabriella and Evangelia Betarrini are just two normal American teenagers. Normal except for the fact that they time travel to fourteenth-century Italy, where they've lived in castles they've seen as crumbling ruins, become swept up in historic battles, and fallen in love with handsome knights willing to do anything to keep them alive. They've returned to the present to save their father, just short of his tragic death, and now all four return to the...