Recruited by the Hystorians, a secret society that dates back to Aristotle, the kids learn that history has gone disastrously off course.Now it's up to Dak, Sera, and teenage Hystorian-in-training Riq to travel back in time to fix the Great Breaks . . . and to save Dak's missing parents while they're at it. First stop: Spain, 1492, where a sailor named Christopher Columbus is about to be thrown overboard in a deadly mutiny!

    Each message brings her closer to believing that only she can prevent a tragic death. Until the final note makes her think she’s too late.

    Chess has always been the protector over his younger siblings, Emma loves math, and Finn does what Finn does best—acting silly and being adored. They’ve been a happy family, just the three of them and their mom.But everything changes when reports of three kidnapped children reach the Greystone kids, and they’re shocked by the startling similarities between themselves and these complete strangers. The other kids share their same first and middle names. They’re the same ages. They even have identical birthdays. Who, exactly, are these strangers?Before Chess, Emma, and Finn can question their mom about it, she takes off on a sudden work trip and leaves them in the care of Ms. Morales and her daughter, Natalie. But puzzling clues left behind lead to complex codes, hidden rooms, and a dangerous secret that will turn their world upside down.

    But when Charlotte's scientist father makes an astonishing discovery that the Germans will covet for themselves, Charlotte is faced with an impossible choice between danger and safety. Should she remain with her friend or journey to another time and place? Her split-second decision has huge consequences, and when she finds herself alone in the world, unsure of Kitty's fate, she knows that somehow, some way, she must find her way back to her friend. Written in the spirit of classic time-travel tales, this book is an imaginative and heartfelt tribute to the unbreakable ties of friendship.

    Every artist possesses a Genius, a birdlike creature that is the living embodiment of an artist's creative spirit. Those caught with one face a punishment akin to death, so when Giacomo discovers he has a Genius, he knows he's in serious trouble.Luckily, he finds safety in a secret studio where young artists and their Geniuses train in sacred geometry to channel their creative energies as weapons. But when a murderous artist goes after the three Sacred Tools--objects that would allow him to destroy the world and everyone in his path--Giacomo and his friends must risk their lives to stop him.

    But when a fourth child, Max, a knife-thrower, joins the group, it sets off an unforgettable chain of events. When the museum’s Amazonian shrunken head is stolen, the four are determined to get it back. But their search leads them to a series of murders and an explosive secret about their pasts. This sensational new series combines the unparalleled storytelling gifts of Lauren Oliver with the rich knowledge of the notorious relics collector H.C. Chester. What you will NOT find in this book:– An accountant named Seymour– A never-ending line at the post office– Brussel sprouts (shudder)– A lecture on finishing all your homework on time– A sweet, gooey story for nice little girls and boys.

    All for one and one for all!On a family trip to Paris, Greg Rich's parents disappear. They're not just missing from the city—they're missing from the century. So, Greg does what any other fourteen-year-old would do: He travels through time to rescue them.Greg soon finds out that his family history is tied to the legendary Three Musketeers. But when he meets them, they're his age, and they'll only live long enough to become true heroes if he can save them.To rescue his parents, Greg must assume the identity of a young Musketeer in training and unite Athos, Porthos, and Aramis—but a powerful enemy is doing everything possible to stop him.

    His parents are members of the Septemberist Society, whose job it is to protect humanity from hideous giants called the Mangleborn. Trapped in underground prisons for a thousand years, the giant monsters have been all but forgotten -- but now they are rising again as the steam-driven America of 1875 rediscovers electricity, the lifeblood of the Mangleborn.When his parents and the rest of The Septemberists are brainwashed by one of the evil creatures, Archie must assemble a team of seven young heroes to save the world.

    Sent to spend the summer in the heart of storm country with her father in the special StormSafe community his company has developed, Jaden Meggs is excited to reconnect with her dad after he spent years researching storm technology in Russia. She’ll also be attending the exclusive summer science camp, Eye On Tomorrow, that her dad founded. There, Jaden meets Alex, a boy whose passion for science matches hers, and together they discover a horrible truth about her dad’s research that is putting countless lives at risk. As a massive tornado approaches, threatening to destroy everything in its path, Jaden is torn between loyalty to her dad and revealing his secret. Can she find the courage to confront her dad and save everyone from the biggest storm yet?

    He was forgotten. When everyone else in the world disappeared one afternoon, these children were the only ones left behind. There's Darla, who drives a monster truck; Felix, who used string and wood to rebuild the internet; Lane, who crafts elaborate contraptions for live entertainment; and nearly forty others, each equally brilliant and peculiar. Inspired by the prophecies of a mysterious boy who talks to animals, Martin believes he can reunite them all with their loved ones. But believing and knowing are two different things, as he soon discovers with the push of a button, the flip of a switch, the turn of a dial...A whimsical apocalyptic fable that carries readers to a future world without adults, a journey filled with dark humor that every reader will want to take.

    Before their universes collided. Before they fell in love.Riveting and romantic, Undone: An Unraveling Novella contains three short stories set in the world of Unraveling, the first book in the gripping sci-fi duology by Elizabeth Norris.Before Ben Michaels saved Janelle Tenner’s life, Janelle saved Ben when he stumbled through an interuniverse portal into a completely new world. That day, he fell in love with the girl of his dreams. And he never forgot her.Through three stories told from Ben’s point of view, learn how Ben and his friends discovered their ability to travel between worlds, how Ben first met Janelle, and how he pined for her for years before he actually got the chance to meet her, save her life, and capture her heart. And find out what happens to Ben between the cliff-hanger conclusion to Unraveling and the beginning of its heart-stopping sequel, Unbreakable.

    At least not permanently.The Time Collision came from beyond the stars, a cosmic event that fractured time and space, tearing apart the earth and reshaping it into something entirely new.This is the world Diego Ribera was born into. The past, present, and future coexisting together.Timeless.In New Chicago, Diego’s middle school hallways buzz with kids from all eras of history and from cultures all over the world. The pieces do not always fit together neatly, but this is the world he loves. There are those, however, who do not share his affection.On his thirteenth birthday, Diego learns of a special gift he has within, a secret that is part of something much bigger—something he cannot understand. When his father, New Chicago’s top engineer, is taken by the Aeternum, Diego must rescue him and prevent this evil group from disrupting the fragile peace humanity has forged.With more than 150 full-color illustrations."Diego sped over New Chicago, its canals and train tracks clogged with the morning traffic of steamships and trolleys, its sidewalks crowded with topcoats, leather tunics, and fine capes, a world bursting in color and sound, in the smell of horse droppings and engine grease, corn roasting on food carts, and the sea. Off in the distance, the exhaust clouds from the great steamships and harbor robots colored the sunrise gold.He spotted the girl up ahead, knifing through the sky. He had to catch her before it was too late. Diego didn’t know why, just knew he had to. Something to do with time, he thought. It was always time, running forward and backward through this world, but in this dream . . .Running out."

    They are recruited by an agency that no one knows exists, with only one purpose—to fix broken history. Because time travel is here, and there are those who would go back in time and change the past. That’s why the TimeRiders exist: to protect us. To stop time travel from destroying the world...

    But his talents are viewed with suspicion in Cove, a steam-powered city built inside a mountain. In Cove, creativity is a crime and “invention” is a curse word. Kallista Babbage is a repair technician and daughter of the notorious Leo Babbage, whose father died in an explosion—an event the leaders of Cove point to as an example of the danger of creativity. Working together, Trenton and Kallista learn that Leo Babbage was developing a secret project before he perished. Following clues he left behind, they begin to assemble a strange machine that is unlike anything they’ve ever seen before. They soon discover that what they are building may threaten every truth their city is founded on—and quite possibly their very lives.

    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!