Author: SPRULL STEVEN G & VINGE JOAN D
Title: THE JANUS EQUATION & LEGACY
Description: Dell, 1980. 1st printing. Janus: A corporate mathematician is developing an equation that could enable time travel, but he has lost his mojo. Legacy: The Heaven System has a society of survivors of a civil war who are barely clinging to existence. Paperback. ISBN: 0440108217. near fine paperback, illustrations by Jack Gaughan.

Keywords: 0440108217