City of Loons (The Walls of Orion duology)

There aren't many places to run in a city surrounded by a wall.

Courtney Spencer has left her safe, normal life behind. Joining up with Orion City's #1 Most Wanted man, she plunges headfirst into an underworld she never knew existed—a realm full of Changers, like herself, willing to do whatever it takes to bring Orion's darkest shadows into the light of day.

But W's plan for justice may reach further than she's willing to go. With a murderous organization on their heels, and her detective ex-...