The Devil Undercover

After recovering from an illness that almost caused her to die, Katie, a talented young novelist, begins to experience strange hallucinations about voices and the appearance of spirits wandering around her.
Her paranoid attitude became even worse when she began to feel the hatred and revenge directed at her by her family, her two bestfriends and her ex-lover who had even planned to kill her.
The only ones she can trust are Daniel, her cynical and cold younger brother and Ben, her good but mysterious new editor.
Daniel and Ben, who are now the people she trusts most, actually reveal a dark secret that she forgot and how she, who has always played the role of the helpless victim is actually the main mastermind behind the destruction of the lives of the people around her.
She is Lilith, she is the devil.
They say human life is not eternal, humans are not the same as devils who can live for millions of years without having to fear death. After Adam broke my heart, I fell in love for the second time. Ellios, an ordinary human being who made me decide to live with him forever. But just like Adam, Ellios would rather love a human than a devil like me.
No, this time I will not just shut up and surrender. If I can't have him, then no woman can. I sacrificed his soul before killing him, so he could be reborn and he would learn to love me. However, the two crazy demons who are so obsessed with me, Lucifer and Asmodeus always try to destroy my plans. Sure, I won't let them destroy the plans I have made, because I am Lilith, I am the devil.