problems Doctor Cleopatra "Cleo" June Markham Forbin has lost seven years of age between books, even though The Fall of Colossus is supposed to be five years after Colossus. No accounting of her reverse aging is given. Colossus is set in the 20th century, Chapter 10 narrows that to the 1990s; however, numerous references in The Fall of Colossus set it in the 22nd century, while it is supposed to take place five years after Colossus. No accounting for this time difference is given. The Soviet defense computer is called "Guardian of the Socialist Soviet Republics" in Colossus, then "Guardian of Democratic Socialism" in The Fall of Colossus, with no explanation. Editions 1974, U.S. (hardcover), Putnam () 1975, U.S. (paperback), Berkley Books () 1977, U.S. (paperback), Berkley Books () See also Colossus Colossus and the Crab List of fictional computers External links 1974 science fiction novels 1974 British novels Novels about computing Novels by D. F. Jones G. P. Putnam's Sons books