A Hidden Fire(2011)

Grace DravenElizabeth Hunter

A phone call from an old friend sets Dr. Giovanni Vecchio back on the path of a mysterious manuscript he's hunted for over five hundred years. He never expected a young student librarian could be the key to unlock its secrets, nor could he have predicted the danger she would attract.

Now he and Beatrice De Novo follow a twisted maze that leads from the archives of a university library, though the fires of Renaissance Florence, and toward a confrontation hundreds of years in the making.