Circle of the Raven

Behind the excitement and technological progress of Industrial-Revolution-era London, strange things have begun to happen. Members of the blue-blooded nobility have started going missing, important artifacts have been disappearing, and an ancient cult has stepped out of the shadows to make itself known to the rest of the world.
When an elite religious order known only as "The Ravens" gets its hands on an ancient and powerful talisman, no one but the cult itself knows about its disappearance or the power it wields. Or so they think. Little do they know, a secret organization tasked with protecting the unsuspecting citizens of London has found out about the missing talisman and knows only too well the potential devastation of such an object. Because of this knowledge, they will stop at nothing to get the mystical artifact back into safe hands.
That's where thief Jac Dupont comes in.
A street-savvy orphan, Jac is the seventeen-year-old leader of a renowned band of thieves. Each member possesses a unique set of skills that allows them to collectively take on some of the most difficult heists of the century. There's not a single person involved in the black market who hasn't heard of the highly-skilled gang and its enigmatic leader. But there's one thing no one outside of the tight-knit group has ever figured out.
"Jac" is short for Jacqueline.