Hardcover
(Viking Books for Young Readers, Oct. 30, 1988)
Although her people have been forced to live underground for many years by the evil Okira, Reena discovers the forbidden door to the outside world and manages to free them.
Having spent all her life in fabulous underground caves, Reena stumbles upon the Forbidden Door to Outside and discovers the terrible secret of the Okira, who had forced Reena's ancestors into the caves many years before. Reprint.