Michael by Jennifer Field

Dr. Michael Guérisseur holds more secrets than truths these days.
His work in the human sector is unparalleled, and he’s given his Blood Angel brethren advances in technology to survive undetected. But he’s sheltered himself, never letting anyone see who he really is… not until a rowdy, smart-mouthed woman calls him out at a neuroscience convention of all places.
Dr. Salem Night doesn’t look or act like anyone he’s ever encountered outside a biker bar. She is the good Doctors’ polar opposite, tattoos and cherry lips with an intellect to rival his own.
One will have to make the ultimate sacrifice to save mankind from a plague of rogue vampires they never saw coming.
Will opposites attract or go up in flames with the rest of humanity?