In Undercurrent, Paul Blackwell’s fast-paced YA thriller, sixteen-year-old Callum Harris survives a plummet over a waterfall, but wakes to find himself in a life that’s totally different from the one he knew.

His parents were separated. Now they’re together. His brother Cole was a sports star. Now he’s paralyzed. And Callum, who used to be quiet and sort of unpopular, is suddenly a jock with two hot girls after him.

But there’s one difference that matters more than all the others combined: His former best friend wants Callum dead. And he isn’t the only one.