Suzy McKee Charnas’ 1980 The Vampire Tapestry is a stand-alone hard-SF vampire novel, consisting of five short episodes in the life of her protagonist.
Dr. Edward Weyland is a respected academic who specializes in dream research. Aloof and good-looking, he is catnip to most of the women and some of the men on Cayslin College campus. This is less luck than adaptation, for Weyland is a vampire. Colleagues and students are prospective food.
His research provides him with all the sustenance he could want. Alas, this comfortable life is about to hit a snag in the form of a South African widow.