But her practical scientific mind is put to the test when her older brother, Simon, discovers a mysterious path of stones that allows them, along with Abbey’s twin, Caleb, to travel back and forth between their world and what appears to be...the future. Unfortunately, they’re not the only ones who know about the stones, and they soon realize their lives are in danger from a man known only as Mantis. Abbey, Caleb, and Simon must follow a twisting trail of clues that will lead them from their autistic neighbor, Mark, to a strange professor who claims to know the rules of the stones, and to multiple futures—some of whose inhabitants don’t want to stay put. It will take all of Abbey’s analytical skills to unravel the secrets of the stones, uncover the threads that tie the futures together, thwart Mantis’s plan, and, most importantly, keep her family alive—now and in the future. A Pair of Docks explores Einstein’s Theory of Relativity, the meaning of time, the potential for parallel universes, and the boundary between science and witchcraft. It is the first novel in the Derivatives of Displacement series.

    The walled city of Weld is under attack from ferocious flying creatures that raid in the night, bringing death and destruction. The Warden calls for Volunteers to find and destroy the Enemy sending invaders, and the heroes of Weld answer the call one by one, never to return. Rye is officially too young to go, but his brothers are among the lost and he must find them. What terrors await him beyond the Wall?

    When Larissa Renaud starts receiving eerie phone calls on a disconnected old phone in her family's antique shop, she knows she's in for a strange summer. A series of clues leads her to the muddy river banks, where clouds of fireflies dance among the cypress knees and cattails each evening at twilight. The fireflies are beautiful and mysterious, and they take her on a magical journey through time, where Larissa learns secrets about her family's tragic past--deadly, curse-ridden secrets that could harm the future of her family as she knows it. It soon becomes clear that it is up to Larissa to prevent history from repeating itself and a fatal tragedy from striking the people she loves. With her signature lyricism, Kimberley Griffiths Little weaves a thrilling tale filled with family secrets, haunting mystery, and dangerous adventure.

    They may be brainiacs, but they’re just like everyone else: they fight with one another, watch too much TV, eat Chinese food, and hate walking their dogs. Well, maybe not just like everyone because Ken’s best friend Dan has been building robots. He then secretly sent one to each of the EngiNerds, never letting them know he’s the mastermind. At first Ken is awed and delighted: what kid hasn’t dreamed of having a robot all their own? Someone who can be their friend, clean their room, walk the dog, answer homework questions…how amazing is that? But be careful what you wish for: Dan’s robot, Greeeg, may look innocent, but his ravenous consumption of food—comestibles—turns him into a butt-blasting bot. And once the other robots ‘come alive’ it’s up to the motley crew of EngiNerds to not only save the day, but save the planet!

    It was kind of like how he used to talk about quantum physics or how he used to say ghosts haunted their overgrown golf course. But then one day, after Stuey and his best friend, Elly Rose, spend countless afternoons in the deadfall in the middle of the woods, something totally unbelievable happens. As Stuey and Elly Rose struggle to come to grips with their lives after that reality-splitting moment, all the things Grandpa Zach used to say start to make a lot more sense. This is a book about memory and loss and the destructive nature of secrets, but also about the way friendship, truth, and perseverance have the ability to knit a torn-apart world back together.

    It stuffed the keyholes and scraped against the roof. It shook the walls and made paintings shiver. Seven years ago, the Ballastian sisters' parents left them in the magical Straygarden Place, a house surrounded by tall silver grass and floating trees. They left behind a warning saying never to leave the house or go into the grass. "Wait for us," the note read. "Sleep darkly." Ever since then, the house itself has taken care of Winnow, Mayhap, and Pavonine--feeding them, clothing them, even keeping them company--while the girls have waited and grown up and played a guessing game: Think of an animal, think of a place. Think of a person, think of a face. Until one day, when the eldest, fourteen-year-old Winnow, does the unthinkable and goes outside into the grass, and everything twelve-year-old Mayhap thought she knew about her home, her family, and even herself starts to unravel. With luscious, vivid prose, poet and author Hayley Chewins transports readers to a house where beloved little dogs crawl into their owners' minds to sleep, sick girls turn silver, and anything can be stolen--even laughter and silence.

    Your personality has changed. So has your mom’s and your best friend’s. What about the rest of the world? What if you were the one who accidentally unlocked the 13th sign, causing this world-altering change—and infuriating the other 12 signs?  Jalen did it, and now she must use every ounce of her strength and cunning to send the signs back where they belong. Lives, including her own, depend on it.

    . . an abandoned demon . . . a ghost who wants to erase history . . . a killer commandant . . . These are just some of the challenges confronting the young heroes in this highly entertaining anthology.All but one of the heroes previously starred in a popular book from Rick Riordan Presents. You''ll be reunited with Aru Shah, Zane Obispo, Min the fox spirit, Sal and Gabi, Tristan Strong, Nizhoni Begay, Paola Santiago, Sikander Aziz, and Riley Oh. Who is the new hero? Read Rick Riordan''s short story to find out!Ten bestselling and award-winning middle grade authors contributed to this collection: Roshani Chokshi, J.C. Cervantes, Yoon Ha Lee, Carlos Hernandez, Kwame Mbalia, Rebecca Roanhorse, Tehlor Kay Mejia, Sarwat Chadda, Graci Kim, and Rick Riordan, who also served as the editor.The cultures represented by these own-voices stories are: Indian, Mesoamerican, Korean, Cuban, Black American, African, Navajo, Mexican, Mesopotamian, and Celtic.There''s something for everyone in this collection of fast-paced and funny adventure stories that show what it takes to be a hero in any time, setting, and universe.Read more about the heroes in these best-selling books:Rick Riordan Presents: Aru Shah and the End of Time by Roshani ChokshiRick Riordan Presents: The Storm Runner by J.C. CervantesRick Riordan Presents: Dragon Pearl by Yoon Ha LeeRick Riordan Presents: Sal and Gabi Break the Universe by Carlos HernandezRick Riordan Presents: Tristan Strong Punches a Hole in the Sky by Kwame MbaliaRick Riordan Presents: Race to the Sun by Rebecca RoanhorseRick Riordan Presents: Paola Santiago and the River of Tears by Tehlor Kay MejiaRick Riordan Presents: City of the Plague God by Sarwat ChaddaRick Riordan Presents: The Last Fallen Star by Graci Kim

    Clara has never known another home. In fact, she's confined to the grand estate due to a mysterious heart condition. But it's a comfortable life, and if it weren't for the creepy squawking birds in the aviary out back, a completely peaceful one too. But once old Mrs. Glendoveer passes away, Clara comes to learn many dark secrets about the family. The Glendoveers suffered a horrific tragedy: their children were kidnapped, then drowned. And their father George Glendoveer, a famous magician and illusionist, stood accused until his death. As Clara digs deeper and deeper into the terrifying events, the five birds in the aviary seem to be trying to tell her something. And Clara comes to wonder: what is their true identity? Clara sets out to solve a decades-old murder mystery—and in doing so, unlocks a secret in her own life, too. Kathleen O'Dell deftly weaves magic, secret identities, evil villians, unlikely heroes, and the wonder of friendship into a mystery adventure with all the charm of an old fashioned classic.

    He was determined to root out the criminals that had invaded the town. But then he was murdered, and most people believed the Chief of Chiefs, most powerful of the criminals, was responsible. Nnamdi has vowed to avenge his father, but he wonders what a twelve-year-old boy can do. Until a mysterious nighttime meeting, the gift of a magical object that enables super powers, and a charge to use those powers for good changes his life forever. How can he fulfill his mission? How will he learn to control his newfound powers?

    Medium looks. Medium grades. Medium parents who barely notice him. With a list of phobias that could make anyone crazy, Mack never would have guessed that he is destined for a more-than-medium life.And then, one day, something incredibly strange happens to Mack. A three-thousand-year-old man named Grimluk appears in the boys' bathroom to deliver some startling news: Mack is one of the Magnificent Twelve, called the Magnifica in ancient times, whatever that means. An evil force is on its way, and it's up to Mack to track down eleven other twelve-year-olds in order to stop it. He must travel across the world to battle the wicked Pale Queen's dangerous daughter, Ereskigal--also known as Risky. But Risky sounds a little scary, and Mack doesn't want to be a hero. Will he answer the call?A laugh-out-loud story filled with excitement and magic, "The Magnificent Twelve: The Call" is the first book in bestselling author Michael Grant's hilarious new fantasy adventure series.

    For one thing, kids as young as twelve get to apply for these prestigious summer jobs. And as for the applicant pool . . . well, these kids come from all over history.When Delia finds herself working at the Time Museum, the last thing she expects is to be sent on time-traveling adventures with an unlikely gang of kids from across the eons. From a cave-boy to a girl from the distant future, Delia's team represents nearly all of human history! They're going to need all their skills for the challenge they've got in store . . . defending the Time Museum itself!

    Rowan would give anything to switch places, but the rule is, the oldest child is next in line, even if she is only older by two minutes. She resigns herself to admiring her royal monster hunter aunt's official sword and having tea with dignitaries with her mother, the queen. But a tragic event breaks up longstanding rules, and now Rowan finds herself in hunt of a dangerous gryphon.Accompanied by a feisty and determined baby jackalope and a giant wolf that barely tolerates her, she sets off on a journey that will see her join forces with other unlikely allies: a boy who has ambitions of his own to hunt monsters, and a girl from a nearby clan with hidden motives for befriending Rowan. It will take all of Rowan's skills, both physical and diplomatic, to keep this journey on track. The future of the kingdom depends on it.

    But she’s about to discover that witches aren’t just the stuff of movies, books, and spooky stories. When some eighth-grade bullies try to ruin her Halloween, something really strange happens. It turns out that Founder’s Bluff, Massachusetts, has a centuries-old history of witch drama. And, surprise: Moth’s family is at the center of it all! When Moth’s new powers show up, things get totally out-of-control. She meets a talking cat, falls into an enchanted diary, and unlocks a hidden witch world. Secrets surface from generations past as Moth unravels the complicated legacy at the heart of her town, her family, and herself.

    Ignored by her family and shipped off to her eighth boarding school, Alice would like a friend. And when she rescues Millie Maximus from drowning in a lake one day, she finds one.But Millie is a Bigfoot, part of a clan who dwells deep in the woods. Most Bigfoots believe that people—No-Furs, as they call them—are dangerous, yet Millie is fascinated with the No-Fur world. She is convinced that humans will appreciate all the things about her that her Bigfoot tribe does not: her fearless nature, her lovely singing voice, and her desire to be a star.Alice swears to protect Millie’s secret. But a league of Bigfoot hunters is on their trail, led by a lonely kid named Jeremy. And in order to survive, Alice and Millie have to put their trust in each other—and have faith in themselves—above all else.