In contrast to the "professional heroes" found in adult urban-fantasy novels, many novels aimed at young adult audiences follow inexperienced protagonists who are unexpectedly drawn into paranormal struggles. Amidst these conflicts, characters often gain allies, find romance, and, in some cases, develop or discover supernatural abilities of their own. In Kelley Armstrong's "The Darkest Powers" series, a group of teens with paranormal talents go on the run while fleeing from a persistent band of scientists. "Gone", by Michael Grant, follows an isolated town in which adults have mysteriously disappeared, leaving a society of super-powered children behind. In "Unearthly", by Cynthia Hand, a girl discovers that she is part angel and gifted with superhuman abilities, leading her to seek out her purpose on Earth.