The Immortal's Assistant (en Inglés) - J.P. Flynn

Some say a miracle cured her father's cancer, while others say he made a deal with the devil. Alice wasn't quite sure what to believe, except it was too good to be true.

***

Alice Foster, a Princeton ecology student, never believed in the supernatural. But after her father's sudden disappearance, her frantic search for answers leads to something impossible: a feral reanimated corpse in her basement.

Rescued by a group of peculiar strangers, Alice is thrust into the world of alchemy and dark magic-which is precisely what her father used to cure himself. Now he's become something far more dangerous than she ever imagined, bound by darkness and insane enough to kill anyone in his path.

Desperate to save him, she plunges into the esoteric literature alongside William-a charming new ally haunted by his own father's tragic past. Their connection deepens and hidden truths surface as they race to uncover a way to restore her father's humanity before his bloodthirsty madness consumes him.