In Undercurrent, Paul Blackwell's fast-paced teen 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.

Tense and original, Undercurrent is a psychological thrill ride with sci-fi elements that will appeal to fans of Neal Shusterman. The Bulletin of the Center for Children's Books said, "the riveting opening and intense final scene will keep genre fans satisfied and breathless," while ALA Booklist called it "a menacing, suspenseful thriller."

In a world he doesn’t recognize, where every memory is a lie, who can Callum trust when his own mind is the enemy?

• Unreliable Narrator: With his memory shattered after the accident, Callum can’t tell if he’s losing his mind or if the world has genuinely changed around him.
• Friendship and Betrayal: His best friend Bryce is no longer a friend but a would-be murderer, leaving Callum desperately trying to understand what he could have done to deserve a death sentence.
• High-Stakes Mystery: As the last person seen with the missing Neil Parson, Callum becomes the prime suspect in a dark teen mystery where everyone seems to have a secret.
• Paranormal Thriller: Blurring the lines between psychological suspense and science fiction, this story features a terrifying world where nothing is as it seems and danger lurks behind every familiar face.