"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. Marianne and Ja'el reunite, and help the next generation, including Marianne's neices, with a daunting task: preparing New Earth for massive immigration of Humans from Earth. And they all know that what happens may well determine history for 1000 years.