From the #1 New York Times bestselling author of The Raven Boys, a mesmerizing story of dreams and desires, death and destiny.Something is happening to the source of the dreamers' power. It is blocked. Diminished. Weak. If it goes away entirely, what will happen to the dreamers and those who depend on them?Ronan Lynch isn't planning to wait and find out. Backed by his mentor, Bryde, he is ready to do what needs to be done to save the dreamers and the dreamed . . . even if it takes him far from his family and the boy he loves.Jordan Hennessy knows she will not survive if the dreaming fails. So she plunges into a dark underworld in order to find an object that may sustain her.Carmen Farooq-Lane is afraid of the dreamers -- which is why she's agreed to hunt them down. The closer she gets, though, the more complicated her feelings become. Will the dreamers destroy the world . . . or will the world be destroyed trying to eliminate the dreamers?In the remarkable second book of The Dreamer Trilogy, Maggie Stiefvater pushes her characters to their limits -- and shows what happens when they start to break.