UNDERCURRENT by Paul Blackwell

A shadowy figure. An intense roar. The sensation of falling—fast. That’s all Callum Harris remembers from his tumble over the waterfall. But when he wakes up in a hospital bed and finds his best friend trying to kill him, Callum knows something is seriously wrong. Unfortunately for him, the mysteries are just getting started. Why are his parents acting like he’s some big sports star all of a sudden? And why are all the buildings in town more run-down than Callum remembers? Worst of all . . .