In an alternate London in 1923, one girl accidentally breaks the tenuous truce between dragons and humans in this sweeping debut and epic retelling of Bletchley Park steeped in language, class, and forbidden romance. Perfect for teen fans of Fourth Wing and Babel.

* New York Times Bestseller * #1 International Bestseller * As Seen in Cosmo * Audible Most Anticipated Audiobooks of 2025 * Indigo Best Books of 2025 *

Dragons soar through the skies and protests erupt on the streets, but Vivien Featherswallow isn’t worried. She’s going to follow the rules, get a summer internship studying dragon languages, be smart, be sweet, and make sure her little sister never, ever has to risk growing up Third Class. She just has to free one dragon.

By midnight, Viv has started a civil war.

With her parents and cousin arrested and her sister missing, Viv is brought to Bletchley Park as a codebreaker—if she succeeds, she and her family can all go home again. If she doesn’t, they’ll all die.

As Viv begins to discover the secrets of a hidden dragon language, she realizes that the fragile peace treaty that holds human and dragon societies together is corrupt, and the dangerous work Viv is doing could be the thread that unravels it.

*THE INTERNATIONAL BESTSELLING SERIES WITH OVER 3 MILLION COPIES SOLD!*

THE STORY CONTINUES WITH ALL-NEW NATURALS 5: DANGEROUS IMPULSES, COMING NOVEMBER 2026!

Cold cases get hot in this unputdownable mystery from Jennifer Lynn Barnes, no.1 New York Times bestselling author. Perfect for fans of A Good Girl's Guide to Murder.

Three casinos. Three bodies. Three days.

After a string of brutal murders in Las Vegas, Cassie Hobbes and the Naturals are called in to investigate. But even with the team's unique profiling talents, these murders seem baffling: unlike many serial killers, this one uses different methods every time. All of the victims were killed in public, yet the killer does not show up on any security feed. And each victim has a string of numbers tattooed on their wrist. Hidden in the numbers is a code - and the closer the Naturals come to unraveling the mystery, the more perilous the case becomes.

Meanwhile, Cassie is dealing with an equally dangerous and much more painful mystery. For the first time in years, there's been a break in her mother's case. As personal issues and tensions between the team mount, Cassie and the Naturals will be faced with impossible odds - and impossible choices.

Born smart. Born tough. Born FBI.

Catch every thrilling twist and turn of The Naturals series in:
· The Naturals
· Killer Instinct
· All In
· Bad Blood
· Dangerous Impulses
· Twelve (e-novella)

For more unputdownable stories from Jennifer Lynn Barnes, don't miss the Raised by Wolves trilogy (Raised by Wolves, Trial by Fire, Taken by Storm) and standalones Every Other Day and At First Sight.

*THE INTERNATIONAL BESTSELLING SERIES WITH OVER 3 MILLION COPIES SOLD!*

THE STORY CONTINUES WITH ALL-NEW NATURALS 5: DANGEROUS IMPULSES, COMING NOVEMBER 2026!

New victims. New betrayals. New secrets. The Naturals are faced with their most chilling mysteries yet, in this can't-miss crime thriller from Jennifer Lynn Barnes, #1 New York Times bestselling author.

When Cassie Hobbes joined the FBI's Naturals program, she had one goal: uncover the truth about her mother's murder. But now, everything Cassie thought she knew about what happened that night has been called into question. Her mother is alive, and the people holding her captive are more powerful―and dangerous―than anything the Naturals have faced so far. As Cassie and the team work to uncover the secrets of a group that has been killing in secret for generations, they find themselves racing a ticking clock.

When the bodies begin piling up, it soon becomes apparent that this time, the Naturals aren't just hunting serial killers... They're being hunted.

Catch every thrilling twist and turn of The Naturals series in:
· The Naturals
· Killer Instinct
· All In
· Bad Blood
· Dangerous Impulses
· Twelve (e-novella)

For more unputdownable stories from Jennifer Lynn Barnes, don't miss the Raised by Wolves trilogy (Raised by Wolves, Trial by Fire, Taken by Storm) and standalones Every Other Day and At First Sight.

*THE INTERNATIONAL BESTSELLING SERIES WITH OVER 3 MILLION COPIES SOLD!*

THE STORY CONTINUES WITH ALL-NEW NATURALS 5: DANGEROUS IMPULSES, COMING NOVEMBER 2026!

Cold cases get hot in this unputdownable mystery from Jennifer Lynn Barnes, no.1 New York Times bestselling author of The Inheritance Games series. Perfect for fans of A Good Girl's Guide to Murder.

Cassie Hobbes has a gift for profiling people. Her talent has landed her a spot in an elite FBI programme. After barely escaping a confrontation with an unbalanced killer obsessed with her mother's murder, Cassie hopes she and the rest of the team can stick to solving cold cases from a distance.

But when victims of a brutal new serial killer start turning up, the Naturals are pulled into an active case that strikes too close to home: the killer is a perfect copycat of one of their incarcerated fathers - a man he'd do anything to forget. Forced deeper into a murderer's psyche than ever before, will the Naturals be able to outsmart his brutal mind games before he twists them into his web for good?

Born smart. Born tough. Born FBI.

Catch every thrilling twist and turn of The Naturals series in:
· The Naturals
· Killer Instinct
· All In
· Bad Blood
· Dangerous Impulses
· Twelve (e-novella)

For more unputdownable stories from Jennifer Lynn Barnes, don't miss the Raised by Wolves trilogy (Raised by Wolves, Trial by Fire, Taken by Storm) and standalones Every Other Day and At First Sight.