Between the Devil and the Deep Blue Sea (The Niki Slobodian Series Book 1)

Niki Slobodian sees things – things that aren't supposed to be there. Labeled an Abnormal by New Government, her name is tacked onto the Registry, which seems to be getting longer these days. Now she can't work or she'll end up the same place as her father: in prison. But with no money coming in, Niki's getting desperate. 

So when a mysterious client offers to get her off the Registry in exchange for taking his case, Niki jumps at the chance. All she has to do is round up a homicidal Dark that's escaped from Hell and is cruising around the city in borrowed bodies. The murders are piling up, with Niki's notorious father somehow involved, and Niki's running out of time. And it seems the Dark isn't the only thing that escaped...