Chaos and Ash by Carrie Pulkinen

Forget the demon on my shoulder. The one in my head is driving me mad.

They call me the Ink Master. Sounds badass, right? I come from a long line of monster hunters, so why not?
Don’t get too excited. It’s just a fancy word for librarian. In reality, I’m the most inept witch who ever had the nerve to call Salem her home.
And I’ve just possessed myself with a demon. Yep, I accidentally invited him in, trapped him in my head, and I don’t know how to get him out.
And let me tell you, he is pissed.
He’s not just any demon either. When I flub, it has to be epic, so I summoned Chaos himself. As if I’m not enough of a hot mess on my own.
I’ve got two weeks to get this demon out of my head before Chaos takes over completely and I become the voice in his head.
No problem for a flame-touched witch of Salem, right? Right???