Meet the New Boss

Ness Singer is about to lose everything that she had counted on for most of her life.
She lost her job in the last book, when the demons had come to take her to Crowley.
Castiel has let leviathans into this world. They eat their way out of him and are loose, on the prowl for Sam, Dean, Ness and Bobby.
They burn down Bobby's house, Ness' former home. They burn down Dean and Ness' apartment for over a year.
And the leviathans take away Ness' father, Bobby.
Ness is in denial, grief, even a little anger. She's changing, and she wants revenge.
Heartbreak and anger, betrayal and revenge.
Can Ness get it all, or will she die trying?