Second Wave: Acorna's Children (Acorna Series) / McCaffrey, Anne

It is difficult growing up in the shadow of heroes revered throughout the galaxy. But Khorii became a hero in her own right as she fought to save the universe from a mysterious, deadly plague that not even the healing powers of the Linyaari could stop. Now, confined with the rest of the survivors on Paloduro, it seems as if Khorii and her friends may be able to stem the tide of death and disease. However, ominous signs indicate that the epidemic is only beginning, as old enemies reemerge and a shocking family secret is revealed. With the aid of her android "brother," Khorii must foil the deadly pestilence before a covert mission to cripple the entire star system is catastrophically complete.