When Kate Pierce-Keller’s grandmother gives her a strange blue medallion and speaks of time travel, sixteen-year-old Kate assumes the old woman is delusional. But it all becomes horrifyingly real when a murder in the past destroys the foundation of Kate’s present-day life. Suddenly, that medallion is the only thing protecting Kate from blinking out of existence. Kate learns that the 1893 killing is part of something much more sinister, and her genetic ability to time travel makes Kate the only one who can fix the future.

When two time-traveling historians cross paths during one of the most tumultuous decades of the twentieth century, history goes helter-skelter. But which one broke the timeline? In 2136 Madison Grace uncovers a key to the origins of CHRONOS, a time-travel agency with ties to her family’s mysterious past. Just as she is starting to jump through history, she returns to her timeline to find millions of lives erased - and only the people inside her house realize anything has changed.

A familiar blip of green light in the corner of his room has Kiernan Dunne hoping the new arrival is Kate, so that he can abandon the rescue he's planning. But the time traveler who just blinked in is a future version of Kiernan, and judging from the number scrawled on his forehead, he's not the only copy.

It's never wise to talk to strangers...and that goes double when they're dead. Unfortunately, seventeen-year-old Anna Morgan has no choice. Resting on a park bench, touching the turnstile at the Metro station - she never knows where she'll encounter a ghost. These mental hitchhikers are the reason Anna has been tossed from one foster home and psychiatric institution to the next for most of her life.

"No killing Goblins." So reads the sign outside of The Wandering Inn, a small building run by a young woman named Erin Solstice. She serves pasta with sausage, blue fruit juice, and dead acid flies on request. And she comes from another world. Ours. It's a bad day when Erin finds herself transported to a fantastical world and nearly gets eaten by a Dragon. She doesn't belong in a place where monster attacks are a fact of life, and where Humans are one species among many. But she must adapt to her new life. Or die.

A long time ago in the future, the secret of time travel became known to all. Unsurprisingly, the world nearly ended. There will always be idiots who want to change history. Enter the Time Police. An all-powerful, international organisation tasked with keeping the timeline straight. At all costs. Their success is legendary. The Time Wars are over. But now they must fight to save a very different future - their own. This is the story of Jane, Luke and Matthew - the worst recruits in Time Police history. Or, very possibly, three young people who might change everything.

For five grand a month and a million-dollar chaser, Roger Mulligan didn't care how crazy the old geezer was. All he had to do was keep Joseph Perry Shackleford alive and keep him from squandering the estate for a year. But they didn't tell him about the pixies.

Librarian Sylvia Ashe knows nothing about her past, having grown up without a father and a mother who refused to discuss him. When she stumbles upon a diary that suggests she's descended from magicians, she's skeptical. After all, magicians are special, and she's just an ordinary woman who loves books. She seeks answers from a member of the most prominent family of magicians, but she quickly learns that finding the truth won't be easy, especially when he turns out to be as artless as her, and more compelling and dangerous than books.

Dr. Sam Anderson is one of the most celebrated scientists in history. Ten years ago, he invented a device that changed the world forever. Now his life is about to be ripped apart—and his own creation may be to blame. One fateful morning, Sam discovers that his girlfriend has been murdered and that his daughter is accused of the crime. Sam believes she's innocent, but he can't prove it. There's only one thing he can do to save his daughter: confess to the crime. And so he does. But in the future, murderers aren't sent to prison. They're sent to the past.

Dr. Tyson Klein is a quantum physicist who has dedicated his entire life to his research. At CERN, he analyses data generated by the Large Hadron Collider, the world's biggest and most powerful particle accelerator. Now, Ty believes he's found a pattern in its output. It looks like an organised data stream, being broadcast over what he calls a quantum radio. Could it be a signal from another universe? A message sent from the future? Or something else entirely?

Hector was the best of the best. A government operative who could bring armies to a halt and nations to their knees. But when his own country betrayed him, he dropped off the grid and picked up the first of many bottles. Natalie can’t remember much of her life before her family brought her to the US, but she remembers the cages. And getting taken away to the Project with dozens of other young children to become part of their nightmarish experiments. That’s how she ended up with the ghost of a dead secret agent stuck in her head.

When an experiment to study quantum uncertainty goes spectacularly wrong, physics student Bill Rustad and his friends find that they have accidentally created an inter-dimensional portal. They connect to Outland - an alternate Earth with identical geology, but where humans never evolved. The group races to establish control of the portal before the government, the military, or evildoers can take it away. Then everything changes when the Yellowstone supervolcano erupts in an explosion large enough to destroy civilization and kill half the planet.

Thorne Manor has always been haunted...and it has always haunted Bronwyn Dale. As a young girl, Bronwyn could pass through a time slip in her great-aunt's house, where she visited William Thorne, a boy her own age, born two centuries earlier. After a family tragedy, the house was shuttered and Bronwyn was convinced that William existed only in her imagination. Now, 20 years later Bronwyn inherits Thorne Manor. And when she returns, William is waiting.

As the city prepares to celebrate Queen Victoria's golden jubilee, Veronica Speedwell is marking a milestone of her own. After burying her spinster aunt, the orphaned Veronica is free to resume her world travels in pursuit of scientific inquiry - and the occasional romantic dalliance. As familiar with hunting butterflies as she is fending off admirers, Veronica wields her butterfly net and a hatpin with equal aplomb, and with her last connection to England gone, she intends to embark upon the journey of a lifetime.

Sixteen years ago the Kingdom of Winter was conquered and its citizens enslaved, leaving them without magic or a monarch. Now the Winterians' only hope for freedom is the eight survivors who managed to escape, and who have been waiting for the opportunity to steal back Winter's magic and rebuild the kingdom ever since. Orphaned as an infant during Winter's defeat, Meira has lived her whole life as a refugee, raised by the Winterians' general, Sir.