
Cassie Hobbes reads people like books. Now the FBI wants her gift to solve cold cases. With over 1 million copies sold and a cult TikTok following, this YA thriller is "Criminal Minds for teens" that keeps readers awake until dawn.
Jennifer Lynn Barnes is the bestselling author of The Naturals and a leading expert in cognitive science and the psychology of fiction. Born in 1984 in Tulsa, Oklahoma, Barnes wrote her first novel at nineteen and sold five books while completing her degree at Yale University.
She holds a Ph.D. from Yale (2012) and conducted research at Cambridge University as a Fulbright Scholar, bringing rigorous psychological expertise to her young adult thrillers.
Barnes' background in cognitive science and behavioral analysis directly informs The Naturals' exploration of criminal profiling, gifted teenagers, and the psychological complexities of crime-solving. She has authored more than a dozen critically acclaimed YA novels, including The Inheritance Games series, which became a commercial phenomenon.
Barnes serves as an Associate Professor at the University of Oklahoma with a dual appointment in Psychology and Professional Writing. The Naturals, published in 2013, has been praised as "Criminal Minds for the YA world" and launched a successful multi-book series that established Barnes as a major voice in psychological thrillers for young adults.
The Naturals follows seventeen-year-old Cassie Hobbes, who is recruited by the FBI into a classified program for teenagers with exceptional abilities to solve cold cases. Cassie is a natural profiler who can read people by piecing together tiny details. She joins four other "Naturals" with unique skills—including emotion reading, lie detection, and pattern recognition—to help catch serial killers, though they soon become targets themselves when a new murderer emerges.
The Naturals is perfect for fans of Criminal Minds, psychological thrillers, and YA mystery series who enjoy fast-paced plots with forensic profiling. Readers who appreciate teen protagonists with special abilities, ensemble casts, and suspenseful cat-and-mouse games with serial killers will find this book compelling. It appeals to those who enjoy Jennifer Lynn Barnes' signature style, similar to her work in The Inheritance Games series, particularly readers who love intricate mysteries with romantic subplots.
The Naturals is worth reading for its addictive pacing, unpredictable plot twists, and engaging premise that blends teen drama with FBI procedural elements. Many readers report finishing it within 24 hours and being completely riveted, with reviewers praising the shocking ending they never saw coming. While some note predictable elements and a love triangle subplot, the book successfully balances YA accessibility with darker thriller content, making it an entertaining page-turner that spawned a successful four-book series.
Jennifer Lynn Barnes is a bestselling YA author who graduated from Yale University in 2006 with a degree in cognitive science, the study of the brain and thought. Beyond The Naturals series (four books plus a novella published 2013-2017), she is widely known for The Inheritance Games trilogy, which features similar elements of mystery, romance, and clever plot twists. Her academic background in cognitive science heavily influences her writing, particularly in crafting characters with exceptional mental abilities and psychological depth.
The Naturals program recruits five teenagers, each with a distinct natural ability that aids FBI investigations. Cassie Hobbes is a profiler who reads people through behavioral details; Michael Townsend reads emotions from gestures and expressions; Dean Redding is also a profiler specializing in understanding criminal minds; Lia Zhang functions as a human lie detector; and Sloane Tavish possesses genius-level abilities with numbers, statistics, and pattern recognition. These skills allow them to solve cold cases that have stumped traditional FBI methods.
The Naturals features Cassie Hobbes as the protagonist, a seventeen-year-old profiler whose mother was murdered when she was young. Dean Redding is a brooding profiler who keeps Cassie at arm's length and harbors a dark secret about his serial killer father, Daniel Redding. Michael Townsend is a sarcastic, privileged emotion reader who develops feelings for Cassie. Lia Zhang is a lie detector with an on-off relationship with Michael, and Sloane Tavish is a numbers genius. FBI agents Briggs and Locke oversee the program.
The shocking twist reveals that FBI Agent Lacey Locke, who trains Cassie and the other Naturals, is actually the serial killer they've been tracking—and Cassie's aunt. Locke grew up in an abusive household with Cassie's mother and felt abandoned when her sister left after becoming pregnant. Though she planned to kill her sister herself, someone murdered her first, leading Locke to join the FBI to find the killer while becoming a murderer herself. She attempts to transform Cassie into a killer before Michael shoots her.
The Naturals draws heavy inspiration from Criminal Minds, featuring teenage versions of FBI profilers who hunt serial killers using behavioral analysis. The book uses the term "UNSUB" (unknown subject) to describe suspects, which is strictly a TV-based term popularized by Criminal Minds. Both focus on profiling psychology, cold case investigations, and the dangerous cat-and-mouse dynamics between investigators and killers. Readers who enjoy Criminal Minds' procedural format and psychological depth will recognize similar themes, though The Naturals adds YA elements like romance and teen dynamics.
The Naturals features a prominent love triangle between Cassie, Michael, and Dean that develops throughout the book. Michael, the emotion reader, uses his abilities to get inside Cassie's head and under her skin, while Dean, the fellow profiler, keeps her at arm's length despite obvious chemistry. During a game of Truth or Dare, Lia dares Cassie to kiss Dean, which upsets Michael; later, Michael kisses Cassie himself. Reviewers note Jennifer Lynn Barnes excels at crafting compelling love triangles, similar to her work in The Inheritance Games series.
Cassie's mother was a lounge singer who was murdered when Cassie was young, though her body was never found. Cassie was backstage preparing for her mother's show when she went into the crowd; upon returning to the dressing room, her mother was gone and blood covered the walls. The amount of blood led police to presume her dead. This cold case motivates Cassie to join the Naturals program, hoping the FBI can help solve her mother's murder. The book ends without providing closure about who killed Cassie's mother, setting up future books.
The Naturals series consists of four main novels and one novella.
A novella titled Twelve was published in 2017, expanding the series universe. The complete series allows readers to follow Cassie Hobbes and the other Naturals through multiple cases while developing their relationships and uncovering deeper mysteries about their pasts.
A Natural is a teenager with an exceptional, innate ability to perform specific cognitive tasks that benefit FBI investigations without formal training. The FBI's classified Naturals program identifies and recruits these teens to hone their skills for solving cold cases and tracking serial killers. Agent Briggs explains that Naturals possess abilities like profiling, emotion reading, lie detection, or pattern recognition at levels that surpass trained professionals. These gifts are natural talents rather than learned skills, making the teens uniquely valuable for cracking infamous unsolved homicides.
Feel the book through the author's voice
Turn knowledge into engaging, example-rich insights
Capture key ideas in a flash for fast learning
Enjoy the book in a fun and engaging way
I see patterns.
This program will ruin you.
I need to do this.
What, you thought I was just naturally good at getting inside killers' heads?
Break down key ideas from The Naturals into bite-sized takeaways to understand how innovative teams create, collaborate, and grow.
Experience The Naturals through vivid storytelling that turns innovation lessons into moments you'll remember and apply.
Ask anything, choose your learning style, and co-create insights that truly resonate with you.

From Columbia University alumni built in San Francisco
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
From Columbia University alumni built in San Francisco

Get the The Naturals summary as a free PDF or EPUB. Print it or read offline anytime.
Cassie Hobbes has always been able to read people with uncanny precision. Working at Romano's diner, she can predict exactly how customers like their eggs, whether they'll want extra napkins, and what they'll order before they open the menu. This talent isn't supernatural-it's observation, pattern recognition, and intuition working in perfect harmony, a complex dance she's known all her life. These abilities are a painful reminder of her mother, Lorelei, who built a career claiming psychic abilities while actually possessing the same natural profiling skills as her daughter. One unremarkable Tuesday, a well-dressed teenage boy leaves her a twenty-dollar tip alongside an FBI business card after she correctly guesses not just his breakfast preference, but also that he's left-handed and recently started playing tennis. When Cassie reaches out-hoping for news about her mother's unsolved murder-she discovers Agent Tanner Briggs wants to recruit her for a specialized program because she's a "Natural"-someone with an innate ability to read people that peaks during the teenage years. The program's dual purpose: to educate participants while honing their natural skills, and to use those abilities to assist the FBI with cold cases. For Cassie, whose mother was brutally stabbed five years earlier-her body never found-the opportunity resonates deeply. "I need to do this," Cassie tells her resistant grandmother, "For her. For all the other mothers and daughters who might never get to make memories like we did."
Cassie's new home is a Victorian mansion in Quantico adorned with portraits of serial killers. There she meets her fellow Naturals: Michael, who reads emotions through facial expressions; Lia, who detects lies effortlessly; and Sloane, who calculates complex probabilities while sharing random facts. Dean, brooding and mysteriously uncomfortable around Cassie, shares her natural profiling ability. When Michael mentions Dean's knowledge of killer psychology, he storms off, leaving Cassie curious about his past. The house is designed for "full immersion" training with basement crime scene simulations and a swimming pool that reveals fluorescent blood spatter under black light - every space teaching these teenagers to think like predators to catch them. At a mall, Agent Lacey Locke teaches Cassie and Dean to profile strangers, showing Cassie how using either "I" or "you" when profiling becomes a powerful psychological tool.
During Lia's manipulative Truth or Dare game, Cassie discovers Dean was the first Natural recruited, working with Agent Briggs since age twelve. More shocking, FBI transcripts reveal Dean's father is Daniel Redding, a notorious serial killer. When confronted, Dean responds bitterly: "What, you thought I was just naturally good at getting inside killers' heads?" He confesses his burden-not just being a murderer's son, but fearing he inherited his father's dark impulses. Cassie's training takes a disturbing turn examining photos of murdered women: redheads and psychics-women resembling her mother. When a fresh victim appears, a palm reader with hair dyed red post-mortem, Cassie suspects a connection to her mother's unsolved case. Despite being forbidden from active investigations, the Naturals secretly obtain the case files. When Cassie receives a black box containing a lock of red hair with a note reading "From me, to you," the danger becomes undeniable. The killer knows who she is and has made her his obsession.
When the UNSUB abducts fifteen-year-old Genevieve Ridgerton, a senator's daughter, they leave a message: "CASSIE-WON'T IT LOOK BETTER RED?" The killer targets others because Cassie is protected, forcing her to choose between safety and innocent lives. Despite objections, Director Sterling approves using Cassie as bait. At Club Muse where Genevieve was taken, Cassie finds coded graffiti pointing to "Lorelai" and "North Oakland," leading to a theater connected to her mother's acting career. There, they discover a murder scene recreating Cassie's mother's death, with a small red-haired victim positioned to trigger Cassie's trauma. Cassie and Dean make a crucial discovery - the blood on her mother's light switch came from Cassie turning it on, not the killer. This proves the UNSUB couldn't have been her mother's murderer. The team concludes the killer must be someone in law enforcement with FBI file access. When Cassie learns Lia received her mother's signature Rose Red lipstick left on her bed, she realizes the killer has been inside their house, and Agent Locke urgently tells her to escape.
At the safe house, Michael and Dean draw weapons until shots ring out-Michael falls wounded by Agent Lacey Locke. In the basement, Locke reveals a beaten Genevieve Ridgerton and stabs her when Cassie refuses to do it herself. "I did everything for you!" Locke screams. "I found you! I made you special!" Locke then reveals her true identity: Lacey Hobbes, Cassie's maternal aunt. She explains how Cassie's mother Lorelai abandoned her with their abusive father. Lacey joined the FBI seeking vengeance, having spent years killing women resembling Lorelai while working toward Cassie-not to kill her, but to mold her. Cassie pretends she killed her own mother, distracting Lacey long enough for the wounded Michael to reach his gun and fire, killing Lacey as she lunges to attack.
After Agent Locke's betrayal, the Naturals program hangs in the balance. Despite their trauma, these teenagers remain valuable FBI assets, their abilities forming an exceptional team for solving baffling cases. The cost of these gifts becomes increasingly evident. Dean struggles with his father's murderous legacy, confessing to Cassie, "Sometimes I think like them without even trying. What does that make me?" Michael's charm masks a troubled past of wealth and violence, while Lia's lie-detection prevents genuine connections and Sloane's mathematical genius comes with social difficulties. Cassie bears perhaps the heaviest burden - her profiling ability links her to both her murdered mother and murderous aunt, raising troubling questions about nature versus nurture. If relatives with similar abilities chose different paths, what might her future hold? "We're not defined by what we can do," Briggs reminds them. "We're defined by what we choose to do with it."
The Naturals program operates in a moral gray area, training teenagers to think like killers to catch predators - yet this carries psychological risks they hadn't anticipated. "There's a thin line," Dean explains, "between understanding killers and becoming them." This line manifests in their training. Agent Locke teaches Cassie to use either "I" or "you" when profiling - a grammatical choice representing psychological distance. Using "I" means temporarily inhabiting a murderous mindset. What they didn't know was their mentor had already crossed that line. Her profiling ability came from her own murderous impulses, not academic study. The program meant to catch predators had empowered one. This revelation forces each Natural to question themselves. If Locke could be a killer, how can they trust their own minds or be sure they aren't awakening something dangerous within? Their strength lies in facing this danger together. Unlike Lacey who embraced her dark impulses, the Naturals choose protection over predation, finding safety not in isolation but in trusting each other.