Clan Lasombra Trilogy Series by Bruce Baugh

In the AftermathAnatole, the madman who paradoxically helped her remain sane, is dead. Her hated sire, Archbishop Moncada, was slain by her ex-lover, the Assamite assassin Fatima. Lucita is an assassin herself, and one who did much to change the course of the Sabbat's advance in the Eastern United States. But in these modern nights, she finds herself alone and wandering... moreIn the AftermathAnatole, the madman who paradoxically helped her remain sane, is dead. Her hated sire, Archbishop Moncada, was slain by her ex-lover, the Assamite assassin Fatima. Lucita is an assassin herself, and one who did much to change the course of the Sabbat's advance in the Eastern United States. But in these modern nights, she finds herself alone and wandering. The direction she chooses will come as a great surprise, even to those knowledgeable in the intrigues of the World of Darkness "RM." Especially those knowledgeable ones... less

A Vampire: The Masquerade novel. The Sabbat has Lucita, once the dreaded Antribu killer, on a short leash. Somethink rises from the deep shadows of the Abyss and they want her to find out just what it is. With little choice, she sets out to find the mad priests and hidden Methuselahs of her clan.

A circle of maddened mystics attempts to raise the dread founder of Clan Lasombra from the depths of the otherworldly Abyss. The vampire Lucita and her dubious allies in the bloodthirsty Sabbat must mount a desperate attack to stop them from plunging the world into eternal night. For Lucita, however, the stakes are even greater. After a thousand-year struggle, her soul is slipping into bestial madness with only the blood-rites of her erstwhile enemies able to keep her sane... moreA circle of maddened mystics attempts to raise the dread founder of Clan Lasombra from the depths of the otherworldly Abyss. The vampire Lucita and her dubious allies in the bloodthirsty Sabbat must mount a desperate attack to stop them from plunging the world into eternal night. For Lucita, however, the stakes are even greater. After a thousand-year struggle, her soul is slipping into bestial madness with only the blood-rites of her erstwhile enemies able to keep her sane. To survive must she become the image of the sire she spent an eternity resisting? less