Mister Impossible By Maggie Stiefvater

From the #1 New York Times bestselling author of The Raven Boys, a mesmerizing story of dreams and desires, death and destiny.

The stakes have never been higher as it seems like either the end of the world or the end of dreamers approaches.

Do the dreamers need the ley lines to save the world . . . or will their actions end up dooming the world? As Ronan, Hennessy, and Bryde try to make dreamers more powerful, the Moderators are closing in, sure that this power will bring about disaster. In the remarkable second book of The Dreamer Trilogy, Maggie Stiefvater pushes her characters to their limits - and shows what happens to them and others when they start to break.
 
- Goodreads Summary