 "Fuzzy Ergo Sum" begins shortly after the conclusion of the trilogy, involving characters from those books in further adventures and conflicts.The story ends in a cliffhanger, and is concluded in Diehr's "Caveat Fuzzy".Six months travel by hyperdrive from Terra is the planet Zarathustra, a world colonized by the Chartered Zarathustra Corporation (CZC) to exploit its mineral wealth, including its unique "sunstone" gemstones.