The Final Empire by Brandon Sanderson

For a thousand years the ash fell and no flowers bloomed.
For a thousand years the Skaa slaved in misery and lived in fear while the Lord Ruler reigned with absolute power and ultimate terror, a divinely invincible leader. Hope is long lost, until a terribly scarred, heart-broken half-Skaa in the depths of the most hellish prison and discovered he has the powers of a Mistborn. A brilliant thief and natural leader, Kelsier will turn his talents to the ultimate caper: one with the Lord Ruler himself as the mark.
Only he’s not just planning the greatest heist in history, he’s plotting the overthrow of a divine despot.
Kelsier recruited the underworld’s elite, the smartest and most trustworthy allomancers, each of whom shares one of his many powers, and all of whom relish a high-stakes challenge. But even with the best criminal crew ever assembled, Kel’s plan looks like a long shot, until luck brings a ragged girl named Vin into his life. Like him, she’s a half-Skaa orphan, but she’s lived a much harsher life. Vin has learned to expect betrayal from everyone she meets, and gotten it. She will have to learn to trust, if Kel is to help her master powers of which she never dreamed.