Killer Instinct by Jennifer Lynn Barnes (Paperback)

A gripping young adult thriller where elite teenage profilers are forced into a deadly game with a serial killer who knows far too much about them. Blending psychological suspense, FBI investigations, and high-stakes mystery, this thrilling sequel raises the danger as the Naturals confront a case that becomes painfully personal.

Cassie Hobbes hoped her life might finally become less dangerous after surviving a terrifying encounter connected to her mother’s unsolved murder. As part of an elite FBI programme for gifted teenagers, she expects to focus on analysing cold cases from a safe distance, using her extraordinary talent for reading people and understanding criminal behaviour.

Instead, a new serial killer begins targeting victims in a pattern that shocks the entire team. The murders appear to imitate the crimes of an infamous killer already behind bars, drawing the Naturals into an active investigation that hits especially hard for one of their own. Suddenly, the case is no longer an intellectual exercise—it’s a direct threat to the people they care about most.

As the body count rises, Cassie and the team are forced deeper into the mind of a murderer whose manipulations seem designed specifically for them. Old secrets, buried fears, and fractured loyalties are pushed to the surface as they race to predict his next move before they become part of his twisted plan.

Packed with clever profiling, emotional tension, and relentless twists, this addictive thriller explores how well we can truly know another person—and what happens when a killer knows us better than we know ourselves.

Perfect for readers who enjoy young adult thrillers, serial killer mysteries, FBI investigations, psychological suspense, found-family dynamics, and fast-paced crime fiction with smart, character-driven twists.