*Love makes us do crazy things. Meet Robert Godric, who in a desperate attempt to bring back his wife, Nora, who died of an aggressive brain cancer, invents a way to travel to parallel earths and searches for a living Nora on the infinite number of Earths. Inadvertently, he and his team encounter an alien hivelike race—the Hydra—that is conquering Earth after Earth after Earth. If the Hydra find our world by following Godric back to it, we will not survive the invasion.
*Source: www.deankoontz.com