Sylvia Day takes us into a shadowy underworld, where a powerful angel breaks all the rules by falling for the mortal whose life she's saved...Chained in the dark, Trevor Descansos endures pain and terror as vampires slowly drain the life from him. He finds mercy in Sentinel Siobhán, a beautiful avenging angel with lethal wings. She draws Trevor from the depths of hell, wrapping him in the softness of the same feathers that she wielded like blades to cut down his tormentors.Ageless and eternal, Siobhán has seen too much to be surprised by anything, but the mortal she finds in the pit of a vampire den shakes her to the core. Broken and near death, his ravaged masculine beauty stirs the heart she hadn't realized she possessed. Though she's tasked with eradicating the vampire disease sweeping across her world, she nurses Trevor back to health, healing him even as he awakens a forbidden longing.But the true test has yet to come. Siobhán faces an even darker fate than Trevor's, as she falls from grace into mortal love...Praise for Sylvia Day"Will rock readers with a stunning new world, a hot-blooded hero, and a strong, kick-ass heroine." -- New York Times Bestselling Author Larissa Ione"Hooked me from the first page...I can't wait to read more about this league of sexy, dangerous guardian angels and the fascinating world they inhabit." -- New York Times Bestselling Author Lara Adrian"Explodes with passion and heat." -- Cheyenne McCray, New York Times bestselling authorIncludes a preview of the next Renegade Angels novel, A Hunger So Wild, available in July