Luke and Luna, two mysterious teenagers, have special gifts. Gifts that allow them to defend themselves and save others. No one knows anything about them, except that they're always looking over their shoulders. A few days after they arrive in the small town of Waverly, Ohio, it seems like they're settling down. But once they discover a teenager like them, Luke and Luna are on the run again, trying their hardest to save their friends and themselves from an assassin assigned to kill them. But they never know where to go and where to hide. Because wherever the Guardians are, the Hunters are...

Luke and Luna have moved on since Waverly, this time making their way to South Dakota to train the grumpiest part Guardian and his cheerful sister. While Jasper and Lenai are being trained, other things just have to get in the way: Hunter attacks, huge misunderstandings, and, of course, kidnappings. But there's a bigger distraction: a third Guardian, and he's not exactly the friendly type. Despite his secrets, Luke and Luna are determined to get him to trust them, while hoping that it's not going to be a mistake.

Ever since Sativa Marano's sister died in a car accident, Sativa has been searching for the necklace her sister died trying to save. But the necklace has fallen into the hands of the most dangerous villain in the world: the Silver Ghost. The necklace has the destructive power for the Silver Ghost to wipe out everyone Sativa cares about unless she can get it back. Although she starts out this journey alone, Sativa meets many others along the way - Benjy, a strange, lonely boy who could turn out to be an enemy; Elias, a Russian spy with a dark past; and Donovan, someone linked to Sativa's...