Science Fiction Time Travel

Nyx was born Hollow. An empty vessel in a world of spirits. Normally, that was a death sentence, yet somehow he survived. He's always been stubborn like that. He's also always been a bit crazy. Which is why, in another life, he did something reckless. He sent himself a message—his memories. Threw them into the Flow from which all spirits return. Besides, Nyx believed in asking hard questions. Like, was reincarnation real?

One day, six towers appear on Earth. Each one stands hundreds of stories tall, and are invulnerable to all attacks. At the base of each tower is a portal, welcoming in all who dare enter it. All sorts of magical monsters can be found inside the towers. Even treasure, magic, and superhuman strength can be acquired. The problem is that the towers aren't a friendly place. Even worse, the towers sometimes release waves of monsters to attack Earth. In the year 2083, there are only a hundred survivors. In one last attempt, they challenge the final floor without regard for their lives.

A flash of lightning, quivering ground, and, instead of her grandparents' farm, Polly sees mist and jagged mountains - and coming toward her, a group of young men carrying spears. Why has a time gate opened and dropped Polly into a world that existed 3,000 years ago? Will she be able to get back to the present before the time gate closes - and leaves her to face a group of people who believe in human sacrifice?

The Jon Ryan of the distant future has an uncontrollable knack for mischief. Now it's really gotten him in trouble. If the universe had a principal's office, he'd be sitting outside it for the next million years! They say the road to hell is paved with good intentions. Look that up, and you'll find Jon's picture in the Wikipedia article. After the evil clan no-time Earth, he simply wanted to restore his home world. And Jon did, but was he satisfied? No. Then he decided to try to repair that timeline to the exact one it had originally been. Talk about a harebrained notion.

Buck and Garth try to retain their humanity as they fight for their lives. How many others can they help? Should they even try? No one knows what's going on except a handful of people and even they aren't sure what happened, but most importantly, how do they stop it? The survivors are rushing to Colorado in an epic race. Time is working against them in more ways than one.

Cynical Jacob Hornblower has followed his brother, Caleb, back in time, hoping to convince him to return home. His mission is soon forgotten, however, when he finds himself captivated by Liberty's spitfire sister, Sunny. But can a man who is down on love truly understand the unbounded strength of the human heart?

When an unconventional offshoot of the US military trains an artificial intelligence in the dark arts that humanity calls “black magic,” it learns how to hack the fabric of reality itself. It can teleport matter. It can confer immunity to bullets. And it decides that obscure Silicon Valley middle manager Adrian Ross is the primary threat to its existence. Soon Adrian is on the run, wanted by every authority, with no idea how or why he could be a threat. But when he investigates the AI and its creators, he discovers his problems are even stranger than they seem.

In The Knight at Dawn, Jack and Annie find peacocks for dinner and boys in skirts when the Magic Tree House transports them back to the Middle Ages for another wild adventure. In this second book in the series, inquisitive, notebook-carrying Jack and his animal-charming younger sister, Annie, find themselves in the middle of an enormous castle. They can hear the beginnings of a feast under way in the Great Hall.

Buck is finally making headway on his journey east. Until he runs into something bigger than all of them. Garth is spinning his wheels. He has a companion who is a great deal of work, but she's also a huge help when he needs it most. Together, they try to dig themselves out of a deep hole. The skies are angry and the time waves are increasing. Nowhere is safe. Except one place and that's not very safe, either. The stakes increase with the struggles as all the players are trying to stay alive long enough to figure it out.

With the defeat of the Overtakers behind them, the five teenagers known as the Kingdom Keepers should be celebrating. By all accounts they saved Disneyland from certain destruction. Why then did their mentor leave one last puzzle for them to decipher? The Keepers must solve a puzzle of the past, or be crushed under an evil that makes the Overtakers seem like gentle souls.

Almost a year has passed since Stella and Tom discovered a time tunnel and travelled to early 1900s London, where they befriended Emma, Lucy ,and Jack. The magical moles that made the tunnel and secret lake appear have since vanished, but the children are longing to meet again. Then an illness, which puts Emma’s life in danger, changes everything. The moles reappear, just when needed, and Lucy realizes the only hope of finding a cure lies in the future.

Tal has found a doorway to an ancient pocket dimension in the woods, but the discovery has cost him dearly. Spellbook is lost somewhere inside, held by an unknown magical force. Should his bond to the book fade, Tal fears he will lose all awareness of the time loop he’s trapped in and any chance of escaping it. He must get Spellbook back before this happens, but the enchantments protecting the pocket dimension are formidable.

Kenna McMillan would do anything for her grandchildren. She would even accompany one of them hundreds of years into the future for a week of Christmas celebrations with the old witch Morna, just to make him smile. But unexpected guests at the inn upend all of their holiday plans. As she learns more about her new acquaintance, she starts to wonder if her week away might take a romantic turn....

When Hugo and Neve settle in Paris, they assume that they will enjoy a few peaceful years away from the turmoil of British politics, but they are not nearly as safe as they believe themselves to be, especially since everyone has something to hide. Meanwhile, Max must learn to adapt to life on a sugar plantation in Barbados, and decide whether to accept help from an unexpected and dangerous source; a decision which may cost him his life.

With each passing day, Kelsea Glynn is growing into her new responsibilities as queen of the Tearling. By stopping the shipments of slaves to the neighboring kingdom of Mortmesne, she crossed the Red Queen, a brutal ruler whose power derives from dark magic, who is sending her fearsome army into the Tearling to take what is hers. And nothing can stop the invasion.

After one death-defying adventure after another, he's ready for some well-deserved downtime. So he's gone to a hot beach in Mareta, a sleepy fishing village in southern Portugal. The year is 1964. He hopes only to flirt with bikinied tourists and drink cold Sagres beers. But two things seem to follow Matt wherever and whenever he goes. A chance to help someone in need, and trouble-trouble-trouble.

Convicted criminal James Griffin-Mars is no one's hero. In his time, Earth is a toxic, abandoned world, and humans have fled into the outer solar system to survive, eking out a fragile, doomed existence among the other planets and their moons. Those responsible for delaying humanity's demise believe time travel holds the key, and they have identified James, troubled though he is, as one of a select and expendable few ideally suited for the most dangerous job in history.

Stuck between dual realities - charged for a murder he doesn’t recall in one and running from a maniacal billionaire who’s determined to kill him in another - Austin’s monotonous life has become an epic adventure of magic, murder, and political intrigue in both the New Republic of Galiana and the streets of Los Angeles California.

Fourteen-year-old Nephele used to have friends. Well, she had a friend. That friend made the adjustment to high school easily, leaving Nephele behind in the process. And as Nephele looks ahead, all she can see is three very lonely years. Nephele is also a whip-smart lover of math and science, so she makes a plan. Step one: invent time travel. Step two: go back in time, have a do-over of ninth grade, crack the code on making friends, and become beloved and popular. Does it work? Sort of. Nephele does travel through time, but not the way she planned - she’s created a time loop.

Derrière la façade très académique de l'institut St Mary, les équipes d'historiens, de techniciens, de chercheurs ont découvert le secret du voyage dans le temps. Ici, on n'étudie pas seulement le passé, on le visite... "J'ai fait des choses stupides dans ma vie. J'ai souvent été imprudente et j'ai enfreint beaucoup de règles. Mais jamais auparavant je n'avais ruiné autant de vies ni laissé un tel désastre derrière moi."