"The Story of New Earth" is Volume 2 of the Casitian Universe series. This novel takes off where "The Casitians Return" left off. Many human beings from Earth have settled on a new planet, called "New Earth." This planet is large and verdant, and a wide variety of people have begun to make their home there. Follow the New Americans, led by Gerard, who failed in his attempt to gain the US Presidency during the "Casitian Crisis." Leticia and Beatrice, Marianne's neices, travel far and wide.
"Humans Untied" is Volume 3 of the Casitian Universe Trilogy. This novel takes off where "The Story of New Earth" (Volume 2) left off. Things on Earth and New Earth are settling down, but then Terrans are faced with an almost insurmountable task, and are getting no help at first from the Casitians in pulling it off. In addition, things get hairy for humans all over the galaxy, as a new Edict from the Galactic Council means enormous changes in human life, all over the galaxy.