Blood Lines - Tanya Huff

An evil being has been sealed away for centuries in a sarcophagus never meant to be opened, waiting patiently for his chance to rise again. Now, brought to the Egyptology Department of Toronto's Royal Ontario Museum, the seals and spells that imprisoned him chipped away from his discoverers, he has reached forth to claim the minds and souls of Toronto's unsuspecting citizens. And only three people had any sense that something was wrong….

For Henry Fitzroy, it began with terrifying images of the sun, a marker of death for a vampire. Fearing for his sanity, he turns to his sometimes-lover, private investigator Vicki Taylor, for help. As the two struggle to cope with Henry's obsession, Vicki's closest friend and former partner Mike Celluci, is following up on two mysterious deaths at the museum, certain that a force from beyond the grave is responsible for everything.