Memory of earth - "Malfunctioning due to its own failing system, the Oversoul, an artificial intelligence caring for the colonists on the planet Harmony, could bring about catastrophic war on the planet unless someone repairs it."--NoveList. Call of earth - "Teenagers are at the heart of the story featuring a sentient computer whose plans involve a return to Earth."--NoveList. Ships of earth - "The planet Harmony is governed by a computerwhose job is to ensure humans are kept at a lowtechnological level so they don't repeat the mess theycaused on Earth. But the computer is breaking down andasks the humans to repair it. For one lot of humans this isan opportunity for freedom."--NoveList.