Mother of Chaos — John Patrick Kennedy

To summon an Angel of Hell… Ruxandra Dracula, a 250-year-old vampire, wants nothing to do with the fallen angel that created her. But when fellow vampire Kade tells her a group of magicians in Moscow is going to summon that angel, Ruxandra knows she must try to stop them. In Moscow, Ruxandra finds herself caught in a web of political and supernatural intrigue. Empress Anna of Russia wants the vampires to be her spies. Her secret police have magic that is nearly impossible to defeat. A cadre of Russian nobles wants them to kill the empress. And the Alchemist, the beautiful, whip-smart leader of the magicians, wants Ruxandra as more than just an experimental subject. As the magicians prepare to summon the fallen angel, Ruxandra must choose: will she kill them to keep the angel from coming, or face the angel and find out her purpose on the earth?