Shadow World (en Inglés) - Daphne C. Kubbinga

HAILEY ALWAYS KNOWS WHEN SOMEONE LIES, BUT TELLING THE TRUTH AND LYING ARE NOT THE SAME. 

HAILEY FELL's life in her small town has never been particularly exciting-or enjoyable for that matter-but all that changes when she spots a dark figure in the forest around her home. She is suddenly thrust into a world that she doesn't recognize. Asked to fulfil a critical role in a scheme she is only beginning to understand. Forced to wade through the veiled truths and lies they tell her. Will she be able to trust this strange new world that she somehow plays a role in protecting? Or will her distrust doom the mission to fail?

ASH ALBORN has a mission. He has never failed to complete an assignment but now he comes across a challenge like never before. Can he overcome the complication that is Hailey Fell and keep the balance between the Dimensions? Or will her inconvenient perceptiveness stop them from preventing a war before it can truly begin?

An unexpected connection between a girl, who isn't as ordinary as she thinks, and a boy, who is playing a much more dangerous game than he realizes, may put the balance between the Dimensions in more danger than any other threat. 

NOTHING IS EVER AS SIMPLE AS IT SEEMS.