The Descent Series, Books 1-3: Death's Hand, The Darkest Gate, and Dark Union

She was destined to be a weapon. Elise Kavanagh is good at one thing: killing demons, angels, and gods. For years, she was the death that supernatural creatures feared. More myth than woman, she walked the Earth as the embodiment of vengeance. But Elise doesn't want anything to do with destiny. She wants time off to spend with the man who has long protected her body and mind. James Faulkner is a powerful witch, and the only one she trusts to protect her identity. Together, they try to become normal people...whatever that means. Destiny hasn't forgotten her. It's not easy to retire when you were born to be a killing machine. Old enemies still hold bitter grudges against Elise. The demon overlord of her new home isn't happy to have the Godslayer hiding out in her territory. And there are still gods that need to be killed...There's only one way out of this. Elise must descend into the infernal to become the very thing she's spent most of her life fighting: a powerful demon that feeds up...… (more)