The Ring of Charon

Allen, Roger MacBride. The Ring of Charon. New York: Tor-Tom Doherty Associates, 1990. [S. F. Book Club], no ISBN.

"First Book of the Hunted Earth." Larry Chao, "an innovative thinker involved in Pluto's gravity control program," performs an unauthorized experiment in which he "activates the human-created mecahnical ring around" Charon, which results in a gravity beam "detected by an alien spy—a half-organic, half-mechanical being who has been waiting for eons" in the Terran Moon. The Earth disappears (cover notes). (RDE, 13/05/94)