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...

    They will meet witches and armored bears, fallen angels and soul-eating specters. And in the end, the fate of both the living—and the dead—will rely on them.Phillip Pullman’s spellbinding His Dark Materials trilogy has captivated readers for over twenty years and won acclaim at every turn. It will have you questioning everything you know about your world and wondering what really lies just out of reach.

    Time tornadoes are ripping people from the present, never to return them, while a woolly mammoth inexplicably appears on banks of the River Thames. Eleven-year-old Silver and her guardian live in a house called Tanglewreck, which is somehow at the center of these mysterious time warps. A strange heirloom called the Timekeeper is hidden somewhere in the house, and Silver must find it and protect it . . . because whoever gets hold of the Timekeeper will have the power to control time-and life as we know it-forever. Reviews The sheer exhilaration of the adventure and the many fascinating historical and scientific allusions will keep readers engrossed through to the satisfying conclusion. -Publishers Weekly An appealing read for fantasy and science- fiction fans alike...Well-developed main characters add liveliness and suspense to the story, while secondary characters (a pair of inept thugs, the original Schr�dinger's cat) add touches of humor to a basically sober story. The climax is chaotic and exciting; the resolution is realistic, bittersweet. -Kirkus Reviews Winterson masterfully weaves together an imaginative array of settings and characters to bring the story to its exhilarating fulfillment. Silver's varied relationships add even more depth, encapsulating family, friendship, deceit, and abuse... [T]his time-bending sci-fi adventure will be a fine addition to young adult collections. -School Library Journal Winterson seamlessly combines rousing adventure with time warps, quantum physics, and a few wonderfully hapless flunkies. Her clever science will draw fans of Madeline L'Engle's A Wrinkle in Time, and her dastardly villains and resourceful youngsters will remind readers of the Lemony Snicket's books about the hapless Baudelaires. --Booklist Silver is a plucky hero in the mold of Neil Gaiman's Coraline and Philip Pullman's Lyra, a creature of action not introspection.

    How can they drive the Imperials away without revealing their own alien origin? The key to the plan is a woodcutter's son named Georyn, who believes the menace beyond the forest to be a dragon. To him, Elana is an enchantress who can give him magical powers that will enable him to defeat it. But she soon finds that this role is no mere pretense and that her feeling for Georyn is deeper than she ever expected it could become. Critical acclaim for Enchantress from the Stars: A Newbery Honor BookA Junior Library Guild selectionAn ALA Notable pickWinner of the Phoenix AwardFinalist for the Book Sense Book of the Year Award

    He’s completely alone — or so he thinks until he finds the ghost girl. She has no toes, wears strange lacy trousers like the grandfather bird, and gives him a stick that can make fire.Daphne, sole survivor of the wreck of the Sweet Judy, almost immediately regrets trying to shoot the native boy. Thank goodness the powder was wet and the gun only produced a spark. She’s certain her father, distant cousin of the Royal family, will come and rescue her but it seems, for now, that all she has for company is the boy and the foul-mouthed ship’s parrot, until other survivors arrive to take refuge on the island. Together, Mau and Daphne discover some remarkable things (including how to milk a pig, and why spitting in beer is a good thing), and start to forge a new nation.Encompassing themes of death and nationhood, Terry Pratchett’s new novel is, as can be expected, extremely funny, witty and wise. Mau’s ancestors have something to teach us all. Mau just wishes they would shut up about it and let him get on with saving everyone’s lives!

    His own people have turned on him. His title is worthless. All he has is a battletorn war machine and a loyal crew of men.Deryn Sharp is a commoner, disguised as a boy in the British Air Service. She's a brilliant airman. But her secret is in constant danger of being discovered.With World War I brewing, Alek and Deryn's paths cross in the most unexpected way…taking them on a fantastical, around-the-world adventure that will change both their lives forever.

    Along the way they have found crewmates and friends, and even a disarming thief who could come to mean much more to Nix.But the end to it all looms closer every day.Her father is obsessed with obtaining the one map, 1868 Honolulu, that could take him back to his lost love, Nix’s mother. Even though getting it—and going there—could erase Nix’s very existence.For the first time, Nix is entering unknown waters.She could find herself, find her family, find her own fantastical ability, her own epic love.Or she could disappear.

    Some of these earths are ruled by magic. Some are ruled by science. All are at war. Joey teams up with alternate versions of himself from an array of these worlds. Together, the army of Joeys must battle evil magicians Lord Dogknife and Lady Indigo to keep the balance of power between all the earths stable. Teens—and tweens and adults—who obsessively read the His Dark Materials and Harry Potter series will be riveted by InterWorld and its sequel, The Silver Dream.

    Barry's more athletic, more aggressive - and he's the one who suggests that they house-sit their great-uncle's farm. Harry hopes that it will bring the two of them closer. And it does, because there's something chilling about the farmhouse, something that makes the locals stay far away. The twins are sure that the locked shed on the property is the reason why, but what they find inside is far more horrible than their worst nightmare. They stumble across a gateway to another universe, where a distortion in time and space causes a dramatic change in their competitive relationship.

    Sixteen-year-old Tegan is just like every other girl living in 2027—she's happiest when playing the guitar, she's falling in love for the first time, and she's joining her friends to protest the wrongs of the world: environmental collapse, social discrimination, and political injustice.But on what should have been the best day of Tegan's life, she dies—and wakes up a hundred years later, locked in a government facility with no idea what happened.The future isn't all she had hoped it would be, and when appalling secrets come to light, Tegan must make a choice: Does she keep her head down and survive, or fight for a better world?

    What if, no matter which direction you travel in time, you must abandon someone you love?Meet 15-year-old Annie Lockwood, a romantic living in the wrong century. When she travels back a hundred years and lands in 1895--a time when privileged young ladies wear magnificent gowns, attend elegant parties, and are courted by handsome gentlemen--Annie at last finds romance. But she is a trespasser in time. Will she choose to stay in the past? Will she be allowed to?

    O'Keefe, he has no idea that this seemingly chance meeting will set into motion a chain of events he will be unable to stop. Caught between Kali's seductive wiles and the trusting adoration of Dr. O'Keefe's daughter, Poly, Adam finds himself enmeshed in a deadly power struggle between two groups of people, only one of which can have right on its side. As the danger escalates, Adam must make a decision that could affect the entire world--which side is he on?

    Anxious to compete, Russian prospectors commissioned inventor Leviticus Blue to create a great machine that could mine through Alaska’s ice. Thus was Dr. Blue’s Incredible Bone-Shaking Drill Engine born.But on its first test run the Boneshaker went terribly awry, destroying several blocks of downtown Seattle and unearthing a subterranean vein of blight gas that turned anyone who breathed it into the living dead.Now it is sixteen years later, and a wall has been built to enclose the devastated and toxic city. Just beyond it lives Blue’s widow, Briar Wilkes. Life is hard with a ruined reputation and a teenaged boy to support, but she and Ezekiel are managing. Until Ezekiel undertakes a secret crusade to rewrite history.His quest will take him under the wall and into a city teeming with ravenous undead, air pirates, criminal overlords, and heavily armed refugees. And only Briar can bring him out alive.

    Foundling begins the journey of Rossamund, a boy with a girl’s name, who is just about to begin a dangerous life in the service of the Emperor. What starts as a simple journey is threatened by encounters with monsters—and people, who may be worse. Learning who to trust and who to fear is neither easy nor without its perils, and Rossamund must choose his path carefully. Complete with appendices, maps, illustrations, and a glossary, Monster Blood Tattoo grabs readers from the first sentence and immerses them in an entirely original fantasy world with its own language and lore.

    A trio of grizzled prospectors found her drifting in an escape pod amid the asteroids, adopted her, and took her to the bandit planet Kezdet, a place where no questions are asked and the girl might grow up free.But Kezdet has its own dark secret. The prosperity of the planet is based on a hideous trade in child slave labor, administered by "The Piper" -- a mystery man with special plans for Acorna and her powers. But free little girls have a way of growing into freedom-loving young women, and Acorna has special plans all her own. . .