Bubbles of Time

When Janni's mindTalent leads her to space, she discovers other human colonies ... and a threat to them all.
On the world of Peace, Janni must persuade her clan of the danger, and move the colonists from another, larger planet to her world.
On Cityworld, in the community of Starview, leader Samanda Lar, facing earthquakes, and water and food shortages after their disastrous move from dying City, foresees a coming menace and faces the daunting task of convincing her people to move to another world.
When aliens attack Peace, Janni must convince the Watchers, who have programmed Janni's clan to replace them, that her clan should remain human.