Train Jumper (Book One)

Seventeen year old Nick Evans has always been the weird one. In the small sleepy town of Roanoke Montana, curiosity, a thirst for adventure and a desire for knowledge is a rarity. And he has them all. So when a mysterious girl is caught sneaking around, Nick is pulled by a mystical force to follow her.
Eighteen year old Alex Walters has been on the run for a good part of five years. After an attack from family enemies she is left without a home, without a family and without a clue of what to do. So when a strange boy, who she can't seem to intimidate, comes along she's even more lost than ever. Together Nick and Alex discover the secrets to each others pasts, an unbreakable friendship and the key to their salvation.