Rysa Walker

To stop her sadistic grandfather, Saul, and his band of time travelers from rewriting history, Kate must race to retrieve the CHRONOS keys before they fall into the Cyrists’ hands. If she jumps back in time and pulls the wrong key - one that might tip off the Cyrists to her strategy - her...

Nine heiresses are missing in Gilded Age New York with no ransom demand. Journalist Miriam Cole's sister was the first to vanish twelve years ago. The only connection? They all attended the exclusive Pembroke School.

In the final book of The Icarus Code, Mars is one giant step closer to life outside the domes, but the fate of both worlds lies in the hands of Tobias Shepherd, a disillusioned cult leader. He thinks Earth is beyond hope, but still believes he can save the chosen few he has brought with him to Mars.

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....

Human cloning. Technology evolves faster than we do. The law shields us from our worst temptations. But the opportunity is there, dangling just out of reach - perfection and ascension or delusion and destruction. The choice is ours....

When Ruth Townsend discovers Tessa Martin’s body in an abandoned factory, sprawled across a Ouija board, she does the responsible thing and calls 911. But by the time Sheriff Blevins arrives, the girl’s body has vanished....

When the rusted-out remains of a vehicle with a unique vanity plate are hauled out of the Freedom River, journalist Ruth Townsend and her best friend, Wren Lawson, think they’ve finally learned the truth about the disappearance of their high school friend, Tanya Blackburn....

A teacup, a diary, and a body at the foot of the stairs.... When Ruth Townsend’s job and marriage both end abruptly, she heads home to the mountains for a fresh start....

Simon Rand's life isn't exactly linear, but he's okay with that. He was older than his mother when they first met, and he's traveled pretty much everywhere the CHRONOS key can take him....

2013 Winner—Amazon Breakthrough Novel Award—Grand Prize and Young Adult Fiction Winner. 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...

A simple blink is all it takes to yank Pru from the car with her dad into a world of hurt. She awakens in 2305 to find herself pinned under what's left of CHRONOS headquarters....

Kiernan Dunne abandoned his family ties to help Kate fight the Cyrists, and he's never regretted that for one moment....

Leah Pfeifer has spent two years in an isolated cabin in Colorado with her almost three-year-old daughter, Anna, trying to protect the girl both from her inherited psychic ability and from the government organization that would be happy to exploit it....

The Cyrists are swiftly moving into position to begin the Culling, and Kate's options are dwindling. With each jump to the past or the future, Kate may trigger a new timeline shift. Worse, the loyalties of those around her - including the allegiances of Kiernan and the Fifth Column, the shadowy...

What if your mind became your worst enemy? Struggling with evolving psychic abilities, seventeen-year-old Anna Morgan and her equally exceptional friends are on the run from the ruthless Graham Cregg, leader of a covert operation known as the Delphi Project. Cregg has already killed repeatedly...

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...

Adesso che i Ciriani sono a un passo dal realizzare il loro terrificante e apocalittico progetto, le opzioni a disposizione di Kate sono...

Per fermare il sadico Saul e la sua banda di viaggiatori nel tempo impegnata a riscrivere la Storia, Kate Pierce-Keller deve essere pronta...

Quando la nonna le racconta di un misterioso medaglione blu, e del dono che lo rende un portale per viaggiare nel tempo, la sedicenne Kate...

From the bestselling author of the Chronos series comes an enthralling novel of time travel, fast-paced action, and history-changing events. When two time-traveling historians cross paths during one of the most tumultuous decades of the twentieth century, history goes helter-skelter. But which...