Bloodline of the Dead. Book 5 of the Vampire Iris Series

Severely weakened and disoriented in a fog of semi-consciousness from years of torture and prolonged confinement in the coffin, Iris is thrust into the shadowy underbelly of London on a perilous mission. Disoriented and unsteady, her usual prowess falters, leaving her vulnerable in the merciless hands of a pack of renegade vampires. In a brutal encounter, she's beaten and overpowered, her blood cruelly extracted and used to spawn an uncontrollable lineage of vampires around London. Now, with the ominous threat of Bakis's wrath looming over her, Iris must navigate a labyrinth of dangers and deceit to halt the proliferation of her bloodline - a daunting task that leads to the discovery of an ancient valley of vampires, and a trip to the far east that unlocks the secrets of the Bloodline of the Dead.
In an attempt to escape the domination of Bakis, Iris brings Grutilla back to life to help her in a final battle for freedom. Can they kill their master, or are they doomed to be enslaved forever?