" The brightness of day darkened to night. Little could be seen except a rider, cloaked and hooded in gray, mounted on a shadowy horse. She felt unexplained attraction, coupled with fear, toward the rider. She was drawn inexorably closer to him. He twisted toward her. Though she couldn't see his features beneath his hood, she felt his cold gaze as if he could see her where she stood in the library. Icy daggers of fear pierced her heart.
Who are you? he demanded. Who watches?
She felt unseen eyes search for her, and felt his smile. The mirror goes both ways, he said. "

― Kristen Britain , Green Rider (Green Rider, #1)