Rysa Walker

An Amazon Breakthrough Novel Award winner--Grand Prize and Young Adult Fiction. 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 …

From the bestselling author of the Chronos series comes a page-turning 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 one broke the timeline? …