Blade’s Bite by Melody Novak

The realms are out of control.
I’m the new girl, but it’s my job to fix reality—and fast.

I don’t even know what it means to be the Guardian of Magic, but my coworker—a grumpy old woman who calls herself Gran, and who thinks I’m a mistake—has already shown up on the doorstep of my brand-new castle. The Guardian of Planes is missing and it’s our job to find him. Preferably fast.
It definitely doesn’t have anything to do with my decision to spare the demigod of chaos from going back to an eternal prison. Unless it does. Oops. The gods are still silent, and the only ones I could pray to are the exact ones that nobody wants showing up again.
It’s up to me and my mates to keep Aviare from splitting apart at the seams… forever.