The Dream Thieves: the graphic novel by Maggie Stiefvater (Book 2)

“Ronan Lynch is made of secrets. His longest kept one? He can pull impossible things out of dreams. It's a secret that's nearly killed him more than once.

Waking the ley line should have led Blue and the Raven Boys straight to Glendower, the Whelsh king rumored to be sleeping beneath the mountains of Henrietta.

But instead, the forest of Cabeswater has disappeared, energy hums and sputters beneath the town, and the Raven Boys' search is at a dead end. Ronan's dreams may be the key to finding Glendower, but none of the Raven Boys are prepared for what will be unleashed in Ronan's desperate attempt to finally control his power.” - taken from Goodreads.

Another great adaptation of the second book in the Raven Cycle.