Havoc (The Drakonian #1)

Imprisoned for years in a government research facility, four vampires unexpectedly find themselves on the run, with the scientist who unintentionally saved them.

After close to a century in a laboratory run by the secret government Department 13, where he and three of his fellow Drakonians are mercilessly experimented on, Havoc resigns himself to his fate. Until one day a new scientist arrives and changes everything…
Not only does she open the cage that holds him captive and facilitates the escape he never thought was possible, she also injects him with an unknown serum that triggers a monumental change in him. A change he’s been avoiding all his life, but is now unable to stop.
On the run, he’s finally forced to accept that his father is dead, making him the Drakonian King. It’s now up to him to save his people, all while resisting his uncontrollable feelings for the woman who changed him, and in the process, ruined his life.

Excited to be working on a top secret genetics project, Dr. Harmony Holmes arrives for her first day on the job full of hope that she will be able to further her career prospects, and also build a relationship with her estranged father. What she finds instead shocks her to her core.
Four vampires held prisoner and tortured mercilessly.
Driven by despair, she opens one of the cages and sets off a string of events that change her life and the lives of everyone around her forever.
Now she's on the run, fighting for her life, while at the same time trying to resist her uncontrollable need for the vampire with the golden eyes, who hates her…