The Gardella Vampire Chronicles series by Colleen Gleason

USA Today bestselling author Colleen Gleason has written more than twenty books for major publishers such as Penguin Group, Harlequin Enterprises, and HarperCollins (as Joss Ware). Her books have been translated into seven different languages.
The Gardella Vampire Chronicles series has a spinoff: Macey Gardella series.

Genre: Romance

The Rest Falls Away (The Gardella Vampire Chronicles, #1)
Beneath the glitter of dazzling 19th-century London Society lurks a bloodthirsty evil...
In every generation, a Gardella is called to accept the family legacy of hunting vampires, and this time, Victoria Gardella Grantworth is chosen, on the eve of her debut, to carry the stake.

Victoria Gardella: Vampire Slayer by Colleen Gleason (The Gardella Vampire Chronicles, #1.5)
A short story introducing readers to the Gardella Vampire Chronicles.
1820: Victoria Gardella tries to enjoy a ball with her new beau, Lord Rockley--but when bloodthirsty vampires come upon the scene, she must leave the fun in order to employ her stake along-side the grim Max Pesaro (vampire slayer) and the mysterious Sebastian Vioget.
For those who are familiar with the series, this story would have appeared halfway through The Rest Falls Away. It was formerly published in The Mammoth Book of Vampire Romance.

Rises The Night (The Gardella Vampire Chronicles, #2)
In Italy, a powerful vampire is amassing the power to control the souls of the dead. Lady Victoria Gardella de Lacy-a vampire slayer for just over a year-races across Europe to stop what could be the most deadly army the Gardellas have ever faced. She is accompanied by Sebastian Vioget, a man as tempting as he is untrustworthy.
But when Victoria discovers that she has been betrayed by one of her most trusted allies, the truth will challenge all her powers as a Venator-and as a woman.

The Bleeding Dusk (The Gardella Vampire Chronicles, #3)
He felt the tiny, warm drip of blood from his cheek where she'd cut him, and the unbearable closeness when she leant forward and pressed an open-mouthed kiss to the edge of his jaw, over the trickle of blood. As Rome prepares for its Carnivale, vampire hunter Lady Victoria Gardella is in no mood for festivities. But her personal grief must be set aside for there is a sinister plot underway. In yet another play for power, vampires have formed an unholy alliance with the demon Akvan in order to gain access to an ancient alchemist's secrets. As their combined bloodthirsty army ravages the city streets, Victoria races to solve the age-old mystery - if she fails, the world is lost for ever.

When Twilight Burns (The Gardella Vampire Chronicles, #4)
After narrowly escaping Rome with her mortality, vampire hunter Lady Victoria Gardella Grantworth de Lacey returns to London - where not even sunrise can stop a vampire's carnage. Not only is Victoria unable to detect the vampire with her heightened senses, but she's being framed as the prime suspect behind the killings.
Meanwhile, the legacy of a vampire's touch has left his blood boiling in her veins and forces her to fight evil on two fronts: against the new breed of undead threatening London and the darkness within herself….

As Shadows Fade (The Gardella Vampire Chronicles, #5)
Directly descended from the very first vampire hunter in the Gardella family, Victoria knows she must continue the lineage so humanity will have protectors against the undead. While Sebastian Vioget appears to be both the perfect warrior and lover to ensure the Gardella Legacy, Victoria cannot forget Max Pesaro - the former slayer still haunted by the vampire queen Lilith's obsession with him. But it is Lilith's obsession that may save all of humanity. Demons, enemies of both mortals and the undead, have found their way to earth. To defeat them, vampires and slayers must fight side by side. But Lilith wants Max in return for her cooperation; a small price for the world, but too high a price for Victoria.