The Black Horseman (The Temple Islands Series Book 1)

On one of the infinite Earths floating through the vast multiverse, a set of random acts of violence inadvertently alters the planet’s destiny, nudging it onto an intersecting course with our own. The strange but familiar planet is whisper close, invisible to the eye, and impossible to touch; it hovers just beyond the reach of our senses, but it is a constant companion and shifting ever closer.
It begins with war, the collapse of a nation, and the execution of two families. The brutal nature of the murders, orchestrated by the deadly Tar Navarra, Executioner from the Temple Islands, forever entwines the fates of two young survivors. Gwaynn and Samantha are alone, afraid, and on the run. Utterly ignorant of their shared peril, they are tenaciously hunted, their paths pushed steadily closer. To survive they must stay one step ahead of the Executioner, but Navarra is ruthless. Navarra is relentless. Navarra is death; the Black Horseman himself, and he will not stop until the two have met their grisly end.