What does it mean to be brave? This is the question Caden must answer as he accompanies Thea, Ben, Rain, and Naomi back out under the dark clouds of the canopy, to rescue Viv from the deadly shadows and save a shattered Earth from the brink of destruction. Caden's lazy, arrogant nature is tested as the group draws closer to finding Viv, forcing him to confront his inner demons and admit his feelings for Thea-even as their relationship is threatened by her ever-growing connection to Ben. Will Caden discover his true potential? Or, when the group uncovers a devastating secret and faces a betrayal that has the power to turn the tide in the war with the shadows, will he abandon his friends and go back to a life of never-ending darkness? Find out in The Gray Horizon, the exciting, action-packed sequel to The War Inside.