Chilren of the Fox by Kevin Sands
Five kids with unusual talents are brought together to commit an impossible crime.
A magic-infused fantasy that brings together a ragtag group of kids to pull off a crime so difficult, countless adults have already tried and failed. Lured by the promise of more money than they've ever dreamed of, five young criminals are hired to steal a heavily guarded treasure from the most powerful sorcerer in the city. There's Callan the con artist, Meriel the expert at acrobatics (and knives!), Gareth the researcher, Lachlan who can obtain anything, and Foxtail, whose mysterious eyeless mask doesn't hinder her ability to climb walls like a spider. Though their shadowy backgrounds meant that they've never trusted anyone but themselves, the five must learn to rely on each other in order to get the job done.
But as Callan has been warned most of his life, it's best to stay away from magic. It can turn on you at any moment, and make you think you're the one running the con game, when in reality you're the one being fooled. Faced with these unsurmountable odds, can the new friends pull off this legendary heist, or has their luck finally run out?-Goodreads