Eternity (Immortals and Magick Book 1)

Anna Greer is a quiet microbiologist with her feet planted firmly in reality. Her life gets turned upside down when she finally meets her elusive employer, Gareth Macgregor. Gareth is mysterious, sexy, powerful…and a vampire.
Soon she's drawn into a world she only thought was mythical, creatures and beings that existed only in nightmares that turn out to be very real.
Anna and Gareth are drawn together in a fight for their lives and Anna finds that there is a part of her that has lain dormant since her childhood, a power that could save them, or mark them for death.
Gareth’s powerful enemy would stop them from finding what Gareth has been trying to find for centuries—a cure for vampirism and a love that transcends time.