Ro and Ru are Underlings-small, clever, and curious. But their peaceful world is turned upside down when the ancient voice of the I AM calls out to them, warning of a dark power that is rising from the shadows. Armed with nothing but their wits and newly discovered gifts, the siblings must embark on a perilous journey to protect their people. As creatures of the Wild Lands awaken with malice in their hearts, Ro and Ru quickly realize...