The Isle of the Deep is really not a single creature but a colony of thousands of individual tubules, an aquatic vector of the Mind Worm which terrorizes Planet's continents. Over its lifetime certain tubules secrete a tough, gluelike substance which hardens to form the characteristic shell that floats the colony and creates the appearance of a rogue island.
- -- Lady Deirdre Skye,
- "A Comparative Biology of Planet"
Centauri Empathy and
Ecological Engineering reveal the vastness and complexity of the ecosystem on Planet. Research into
Centauri Meditation illuminates the next, almost terrifying step-the attempt to communicate directly with Planet itself.