All Phoenix really wants to do is fly - fly and be with Gabriel, the angel. But their world is a brutal one where accelerated evolution has fractured the city into factions that can barely coexist without killing one another. So it seems impossible for earthbound Phoenix to be with airborne Gabriel, one of the rare humans with wings.
Then the Adults come. Violent, fanatical, and "blessed" by evolution with armored flesh that makes them appear only barely human, the Adults are intent on stamping out anyone they see as a mutation - especially those with wings. Phoenix may be the only one who can save Gabriel, but in so doing, she just might start a war that kills everyone she loves - or possibly destroys the whole world.

שם הספר
The Rule of Claw