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Plot Summary

A New Case Emerges

A child abduction case haunts

Cassie Hobbes, a Natural profiler, is part of a unique FBI program that enlists teenagers with extraordinary abilities to solve cold cases. The team is currently focused on the disappearance of six-year-old Mackenzie McBride. Cassie, along with her fellow Naturals, uses her skills to delve into the mind of the abductor, hoping to find Mackenzie alive. The tension is palpable as they await news from Agent Briggs, who is leading the investigation. Cassie's instincts tell her that the suspect they are pursuing is not the right one, and she pushes her team to look deeper.

Secrets and Suspicions Unfold

Tensions rise among the Naturals

Cassie's team, including Michael, Lia, Sloane, and Dean, each bring their unique skills to the table. Michael reads emotions, Lia detects lies, Sloane is a statistics genius, and Dean, like Cassie, is a profiler. As they work together, personal dynamics and past traumas surface, complicating their mission. Cassie struggles with her feelings for both Michael and Dean, while Lia's history with Michael adds another layer of complexity. The team's camaraderie is tested as they navigate their personal issues alongside the case.

Dangerous Games and Alliances

A risky plan takes shape

Despite being warned to stay away from active cases, Cassie and Lia decide to investigate a lead on their own. They attend a college party at Colonial University, where a murder has recently occurred. The victim, Emerson Cole, was a student in a class about serial killers, taught by a professor who is now a person of interest. Cassie and Lia gather information from students, uncovering Emerson's possible relationship with the professor. Their unauthorized investigation puts them at odds with the FBI, but they believe they are getting closer to the truth.

Confronting the Past

Dean faces his father's shadow

Dean is forced to confront his past when the FBI needs his help to communicate with his imprisoned father, Daniel Redding, a notorious serial killer. The encounter is emotionally charged, as Redding manipulates Dean, reminding him of their shared blood and dark legacy. Cassie, who accompanies Dean for support, witnesses the psychological toll it takes on him. The visit yields a potential lead on the case, but it also deepens Dean's internal struggle with his identity and fears.

Unraveling the Killer's Mind

Profiling the killer's psyche

The Naturals are tasked with using social media to profile potential suspects from Emerson's class. They sift through online personas, looking for signs of the killer's traits: a need for control, a troubled family background, and a fascination with violence. As they delve deeper, they uncover unsettling patterns and connections, bringing them closer to identifying the killer. The pressure mounts as they race against time to prevent another murder.

A Desperate Search for Truth

The team faces internal and external threats

As the investigation intensifies, the Naturals must navigate their own personal demons and the growing tension within the team. Cassie's determination to solve the case is fueled by her empathy for the victims and her desire to prove herself. However, the risks of their involvement become increasingly apparent, and the line between right and wrong blurs. The team must rely on their instincts and each other to uncover the truth and stop the killer before it's too late.

Web of Lies and Truths

Redding manipulates with half-truths

Cassie and the team face the chilling reality that Daniel Redding, a notorious serial killer, might have an apprentice. During an interrogation, Redding answers Cassie's questions with a mix of truths and lies, leaving the team to decipher which is which. Lia, the human lie detector, struggles to pinpoint the deceptions, leading to the realization that Redding might have more than one apprentice. This revelation complicates the investigation, as the team races against time to prevent further murders orchestrated by Redding from behind bars.

The Apprentice's Deadly Game

A killer's identity is revealed

The team discovers that Gary Clarkson, a student in the professor's class, was one of Redding's apprentices. His DNA matches evidence found at a crime scene, confirming his role in the murders. However, Clarkson is found dead, killed by the other apprentice, Anthony Webber, a prison guard who idolized Redding. Webber's actions reveal a deadly competition between the apprentices, each trying to prove themselves to Redding by eliminating the other. The team realizes they must stop Webber before he kills again.

A Dangerous Hunt Begins

Cassie and Sterling are abducted

As the team closes in on Webber, he kidnaps Cassie and Agent Sterling, taking them to a remote cabin. Cassie, wearing a GPS tracker, believes Briggs will find them, but Sterling reveals she never activated it. Despite the dire situation, Cassie and Sterling attempt to outsmart Webber, who plans to hunt them for sport. Cassie uses her profiling skills to stay one step ahead, but the situation becomes increasingly desperate as Webber closes in.

Confrontation in the Woods

Cassie fights for survival

In a tense showdown, Cassie uses her wits to evade Webber in the woods. She climbs a tree and throws a rock at him, buying herself precious time. However, Webber recovers quickly and corners her. Just as he is about to kill her, Briggs and Dean arrive, saving Cassie and ending Webber's reign of terror. The team is relieved, but the emotional toll of the ordeal lingers, especially for Cassie, who must reconcile her feelings for Dean and Michael.

Unraveling the Mastermind's Plan

Redding's influence is exposed

Back at the house, the team pieces together the full extent of Redding's manipulation. Webber's journals reveal his obsession with Redding and his desire to surpass him. The team realizes that Redding orchestrated the entire series of events to test his apprentices and to draw Dean back into his orbit. Despite the victory, the team is left grappling with the psychological scars of the case and the knowledge that Redding's influence is far from over.

A New Beginning for Naturals

The program gains official oversight

In the aftermath, the Naturals program is restructured with new oversight to ensure the safety of its members. Agent Sterling returns, committed to guiding the team and preventing future tragedies. The director of National Intelligence approves the program's continuation, allowing the Naturals to consult on active cases under strict supervision. As the team looks to the future, they are united by their shared experiences and the knowledge that they can make a difference.

Characters

Cassie Hobbes

Empathetic profiler with a haunted past

Cassie is a Natural profiler, able to get inside the minds of others, particularly criminals. Her mother's unsolved murder drives her to seek justice for victims. Cassie's empathy is both her strength and her vulnerability, as she struggles with the emotional toll of her work and her complicated feelings for her teammates, Michael and Dean.

Dean Redding

Haunted by his father's legacy

Dean is a fellow Natural and profiler, whose father is a notorious serial killer. The shadow of his father's crimes looms over him, affecting his relationships and self-perception. Dean's struggle with his identity and fear of becoming like his father is a central theme, as he grapples with his role in the investigation and his feelings for Cassie.

Michael Townsend

Charming emotion reader with a rebellious streak

Michael can read emotions with uncanny accuracy, a skill that often puts him at odds with others. His complicated history with Lia and his feelings for Cassie create tension within the team. Michael's charm masks deeper issues, including a troubled relationship with his father.

Lia Zhang

Cunning lie detector with a mysterious past

Lia's ability to detect lies makes her invaluable to the team, but her manipulative tendencies and secretive nature often cause friction. Her loyalty to Dean is unwavering, and her past experiences have shaped her into a fiercely independent and guarded individual.

Sloane

Brilliant statistician with a quirky personality

Sloane's genius with numbers and statistics provides the team with crucial insights. Her social awkwardness and literal interpretation of the world make her an endearing yet challenging teammate. Sloane's loyalty to her friends is steadfast, and she often provides unexpected solutions to complex problems.

Agent Briggs

Determined FBI agent and team leader

Briggs oversees the Naturals program, balancing the need to protect the teenagers with the demands of solving cases. His relationship with Dean is complicated by his past involvement in the Redding case. Briggs is a pragmatic leader, often caught between the FBI's rules and the Naturals' instincts.

Agent Veronica Sterling

Tough profiler with a personal connection

Sterling is brought in to supervise the Naturals after a previous agent's betrayal. Her history with Dean's father and her own traumatic experiences shape her approach to the program. Sterling's no-nonsense attitude and strict adherence to protocol often clash with the Naturals' unconventional methods.

Anthony Webber

Obsessive and deadly apprentice

Webber's obsession with Redding leads him down a dark path, culminating in a series of murders. His desire to prove himself and surpass Redding drives him to eliminate his competitors. Webber's downfall comes when he underestimates Cassie and the Naturals, ultimately paying the price for his hubris.

Plot Devices

The Naturals Program

Teenagers solving cold cases

The program recruits teenagers with extraordinary abilities to solve cold cases, using their unique skills to profile criminals and uncover hidden truths. The program's existence is secretive, and its methods are unconventional, leading to tension with traditional law enforcement.

Social Media Investigation

Uncovering clues online

The Naturals use social media to gather information about potential suspects, analyzing online behavior and interactions to build profiles. This modern approach to investigation highlights the intersection of technology and psychology in solving crimes.

Dean's Confrontation with His Father

A psychological battle

Dean's encounter with his father, Daniel Redding, serves as a pivotal moment in the narrative, forcing Dean to confront his fears and the legacy of his father's crimes. This confrontation deepens the psychological themes of identity and the nature of evil.

Dual Apprentices

Redding's manipulation of multiple killers

Redding's use of multiple apprentices creates a complex web of deception and competition. By pitting them against each other, he maintains control and tests their loyalty. This plot device highlights Redding's cunning and the psychological depth of the story, as the Naturals must navigate the intricacies of his plan to stop the killings.

GPS Tracker

A false sense of security

The GPS tracker worn by Cassie is initially believed to be a lifeline, but its lack of activation adds tension and uncertainty. This device underscores the theme of trust and the importance of communication within the team. It ultimately serves as a catalyst for Cassie's growth and the team's unity.

Analysis

Exploring identity and manipulation

"Killer Instinct" delves into the psychological complexities of identity, manipulation, and the nature of evil. Through the lens of the Naturals, the story examines how past traumas and familial legacies shape individuals. The narrative challenges the characters to confront their fears and insecurities, ultimately highlighting the power of empathy, resilience, and teamwork. The book underscores the importance of understanding the human psyche in solving crimes, while also exploring the ethical dilemmas faced by those who walk the line between justice and vengeance. The Naturals' journey is one of self-discovery and acceptance, as they learn to harness their unique abilities to make a difference in the world.

Last updated:

Review Summary

4.26 out of 5
Average of 100k+ ratings from Goodreads and Amazon.

Killer Instinct receives mostly positive reviews, with readers praising its fast-paced plot, intriguing characters, and unexpected twists. Many enjoy the found family dynamic and the romantic tension between Cassie, Dean, and Michael. Some readers find the love triangle frustrating, while others appreciate the character development. The book is often compared to Criminal Minds for young adults. Several reviewers mention guessing some plot twists but still being surprised by others. Overall, fans of the series eagerly anticipate the next installment.

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About the Author

Jennifer Lynn Barnes is an accomplished author from Tulsa, Oklahoma. She has a diverse background, including experiences as a cheerleader, dancer, primate cognition researcher, and teen model. Barnes began writing at a young age, completing her first book in high school. She graduated from Yale University with a degree in cognitive science in 2006. Following her graduation, Barnes spent a year conducting autism research at the University of Cambridge. Her varied interests and academic background contribute to the depth and complexity of her writing, particularly in her popular young adult mystery and thriller novels.

Other books by Jennifer Lynn Barnes

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