No Escape - Iron Bound, #4

The enemy of my enemy is my friend. At least that's what he wants me to think. The good news: I finally know how to defeat Arkanica. The bad news: it means partnering with Charles Engstrom, the company's founder. He says he's changed. That he wants to atone for what he's done. I have my doubts. As if trusting Engstrom weren't bad enough, to put his plan into action I have to team up with my ex. Who happens to have moved on.
with none other than Charles Engstrom. Yeah, this isn't going to be awkward or anything. And Arkanica isn't the only enemy I have to worry about. I've got problems a lot closer to home. My out-of-control magic will crush anyone who stands in its way-me included-to get me what I want, whether or not it's what I need. And apparently, what I want is Charles Engstrom dead.