Release Message:  Joe Quellen, a 25th-century bureaucrat, investigates "hoppers", travelers from the future whose presence in the past has been documented for hundreds of years,

Description:  The plot concerns Joe Quellen, a 25th-century bureaucrat charged with investigating "hoppers", travelers from the future whose presence in the past has been documented for hundreds of years, and his brother-in-law, Norman Pomrath, an unemployed blue collar worker who ends up being presented with an opportunity to travel back in time. A paradox-filled novel of crackling suspense and breathtaking adventure by a modern master of science fiction.