Shadow of the Sun: Timeless Series, Book One

Gabriella's past is a mystery, but that never stopped her from achieving her goals. As a supernatural specialist, and far more intelligent than anyone her age, she has always been ignored by her peers. Because of the isolation she has always felt, she put her life and soul into her job. Being a supernatural specialist hasn't given her the divine intervention she always longed for, until one day a shipment arrives from Italy containing three dead bodies with an uncanny ability to regenerate....