The Rules of Engagement (Mercer #2)

Everything happens for a reason.
It’s what Ioney Mercer tells herself whenever she pauses to think about the circumstances of her life.
Why did her older brother die?
Why did her mother leave her with five brothers and sisters to raise?
Why did the only person she’d ever fallen in love with have to go?
Because everything happens for a reason.
Saying it was one thing. Believing it was another. And recently, the mantra had started sounding more like an annoying show tune that could easily be tuned out rather than the unfailing piece of truth she needed it to be.
But then, one silly little saying could only get you so far when your life was on the line yet again. More importantly, it meant absolutely nothing when your family was being targeted as well.
Things are starting to shake up in Chicago. Callahan Cordero has been released from prison. His first order of business: Revenge on the person responsible for putting him there.
With nowhere to run or hide, Ioney has no choice but to engage the enemy head on. The only question left to ask is whether she will stand alone, or if help will come from the most unlikely of places.