For readers 12+From the Bram Stoker Award-Winning author of Mason, The Calling, and co-author of the Wicked Dead series comes a tale of urban fantasy and adventure.Shelby and Ava are best friends who find themselves in the wrong part of town. Ava is kidnapped by a group of teens who wield special powers. These magic-using teens live in a rundown factory they call "The Citadel," and are led by an extraordinary girl named, Amber, whose power is greater than the rest. Amber believes Shelby has powers of her own, powers that can help The Citadel's teens. Against terrible odds, Shelby must rescue Ava and save them all from a being known only as "Exile."