Becoming darkness

Toward the end of World War Two Hitler unleashed the Gomorrah virus, which wiped out most of humanity and turned the rest into vampires, except for those like seventeen-year-old Sophie Harkness, who carry a genetic mutation that makes them immune--but when her best friend is murdered and attempts are made on her life, Sophie sets out to discover the dark secrets that lie at the heart of Haven, the last refuge of the immunes.