Slivers of Memory by Kris Ruhler

Worker by day, volunteer at night. This is fifteen-year-old Arctic’s life. Except he’s far from ordinary, and the print shop he works at is just a cover, a safe base for Metas—people with supernatural abilities.
But when Metas start disappearing one by one, his trail of clues leads him into a web of danger. Trapped between the secrets of a hidden world and his turbulent past, he becomes the target of a treacherous hunt.
And that’s just the beginning.
His encounter with a mysterious girl makes him question everything he’s ever believed in. Together, with her as his only ally, he must risk it all to unearth the truth.
Even worse, his own forgotten past is coming back to haunt him.
Who is kidnapping the Metas? Why? And who are the Chosen Legends with the strange marks on their hands?
To find the answers, he may have to seek the same people hunting him down.
Before time runs out.