Twelve-year-old Sophie Foster has a secret. She’s a Telepath—someone who hears the thoughts of everyone around her. It’s a talent she’s never known how to explain. Everything changes the day she meets Fitz, a mysterious boy who appears out of nowhere and also reads minds. She discovers there’s a place she does belong, and that staying with her family will place her in grave danger. In the blink of an eye, Sophie is forced to leave behind everything and start a new life in a place that is vastly different from anything she has ever known. Sophie has new rules to learn and new skills to master, and not everyone is thrilled that she has come “home.” There are secrets buried deep in Sophie’s memory—secrets about who she really is and why she was hidden among humans—that other people desperately want. Would even kill for. In this page-turning debut, Shannon Messenger creates a riveting story where one girl must figure out why she is the key to her brand-new world, before the wrong person finds the answer first.

Sophie Foster thought she was safe. Settled into her home at Havenfield, surrounded by friends, and using her unique telepathic abilities to train Silveny—the first female alicorn ever seen in the Lost Cities—her life finally seems to be coming together. But Sophie's kidnappers are still out there. And when Sophie discovers new messages and clues from the mysterious Black Swan group, she’s forced to take a terrifying risk—one that puts everyone in incredible danger. As long buried secrets rise to the surface, it’s once again up to Sophie to uncover hidden memories—before someone close to her is lost forever. In this second book in the Keeper of the Lost Cities series, Sophie must journey to the darkest corners of her luminous world in a sequel that will leave you breathless for more.

Sophie uncovers shocking secrets—and faces treacherous new enemies—in this electrifying third book in the Keeper of the Lost Cities series. Sophie Foster is ready to fight back. Her talents are getting stronger, and with the elusive Black Swan group ignoring her calls for help, she’s determined to find her kidnappers—before they come after her again. But a daring mistake leaves her world teetering on the edge of war, and causes many to fear that she has finally gone too far. And the deeper Sophie searches, the farther the conspiracy stretches, proving that her most dangerous enemy might be closer than she realizes.

Sophie Foster is on the run—but at least she's not alone. Her closest friends from the Lost Cities have gone with her to join the Black Swan. They still have doubts about the shadowy organization, but the only way to find answers is to start working with them. And as they settle into their new lives, they uncover secrets far bigger than anything they’d imagined. But their enemies are far from done, and unleash a terrifying plague that threatens the safety of an entire species. Sophie and her friends fight with everything they have—with new allies joining them—but every choice has consequences. And trusting the wrong person could prove deadly. In this game-changing fourth book in the Keeper of the Lost Cities series, Sophie must question everything to find a truth that will either save her world—or shatter it.

Dark schemes unfold—and Sophie's loyalty is pushed to the limit—in this thrilling fifth book in the best-selling KEEPER OF THE LOST CITIES SERIES. Sophie Foster is back in the Lost Cities—but the Lost Cities have changed. The threat of war hangs heavy over her glittering world, and the Neverseen are wreaking havoc. The lines between friend and enemy have blurred, and Sophie is unsure whom to trust. But when she's warned that the people she loves most will be the next victims, she knows she has to act. A mysterious symbol could be the key—if only she knew how to translate it. Every new clue seems to lead deeper into her world's underbelly and the Black Swan aren't the only ones who have plans. The Neverseen have their own Initiative, and if Sophie doesn't stop it, they might finally have the ultimate means to control her.

Sophie Foster is struggling. Grieving. Scrambling. But she knows one thing: she will not be defeated. The Neverseen have had their victories—but the battle is far from over. It’s time to change tactics. Make sacrifices. Reexamine everything. Maybe even time for Sophie to trust her enemies. All paths lead to Nightfall—an ominous door to an even more ominous place—and Sophie and her friends strike a dangerous bargain to get there. But nothing can prepare them for what they discover. The problems they’re facing stretch deep into their history. And with time running out, and mistakes catching up with them, Sophie and her allies must join forces in ways they never have before.

This short story told from Keefe's point of view was originally included in the Barnes & Noble exclusive edition of Nightfall.

Sophie Foster doesn’t know what—or whom—to believe. And in a game with this many players, the worst mistake can be focusing on the wrong threat. But when the Neverseen prove that Sophie’s far more vulnerable than she ever imagined, she realizes it’s time to change the rules. Her powerful abilities can only protect her so far. To face down ruthless enemies, she must learn to fight. Unfortunately, battle training can’t help a beloved friend who’s facing a whole different danger—where the only solution involves one of the biggest risks Sophie and her friends have ever taken. And the distraction might be exactly what the villains have been waiting for.

Sophie Foster wants answers. But after a lifetime of lies, sometimes the truth is the most dangerous discovery. Even the smallest secret comes with terrifying new responsibilities. And Sophie’s not the only one with blank spots in her past, or mysteries surrounding her family. She and her friends are part of something much bigger than they imagined—and their roles have already been chosen for them. Every clue drags them deeper into the conspiracy. Every memory forces them to question everything—especially one another. And the harder they fight, the more the lines blur between friend and enemy.

Book 8.5 in the New York Times and USA TODAY bestselling Keeper of the Lost Cities series delivers what fans of the series have been begging for! Told in an exciting new way, the saga continues with plenty of huge reveals and shocking new twists—plus a complete series guide with beautiful color and black-and-white illustrations and other awesome bonuses! In this extra special installment of the Keeper of the Lost Cities series, the story picks up right from Legacy’s particularly devastating cliffhanger. But chapters alternate between Sophie and Keefe’s perspectives to give readers deeper insights into both beloved characters. New powers will be discovered. Hard truths from the past will come to light. And all of your favorite characters will find themselves tested in ways they never imagined. And that's not all! Unlocked also includes a comprehensive guide to the world of the Lost Cities, featuring new character and world details that have never been revealed before—plus fun bonuses like Keeper-themed recipes, a detailed map of the Lost Cities, gorgeous full-color illustrations, and so much more!

In this stunning ninth book in the New York Times and USA TODAY bestselling Keeper of the Lost Cities series, Sophie and her friends discover the true meaning of power—and evil. Sophie Foster changed the game. Now she’s facing impossible choices: When to act. When to trust. When to let go. Her friends are divided and scattered, and the Black Swan wants Sophie to focus on their projects. But her instincts are leading her somewhere else. Stellarlune—and the mysterious Elysian—might be the key to everything. But finding truth in the Lost Cities always requires sacrifice. And as the Neverseen’s plans sharpen into terrifying focus, it appears that everyone has miscalculated. The Lost Cities’ greatest lie could destroy everything. And in the battle that follows, only one thing is certain: nothing will ever be the same.

Unravelled is a new, full\-length novel in the New York Times bestselling Keeper of the Lost Cities series, following fan\-favourite Keefe on his adventures in the human world during the events of Stellarlune. Perfect for fans of Harry Potter, Percy Jackson and Skandar. While his friends faced their own challenges in Stellarlune, Keefe was in the human world. Where did he go, who did he see…and what shocking secrets were revealed to him? This can’t\-miss installment of the series is told entirely from Keefe’s point of view and contains crucial clues about truths buried deep in the elvin world.

Twelve-year-old Sophie finally discovers where her secret telepathic ability comes from when she learns she’s actually not human but is from another world that exists side-by-side with ours.​

Includes short stories from Keefe, Fitz, Linh, Tam, Marella, and more. Publication date TBA.