Chester W. Chester IV inherits a run-down mansion and millions in back taxes. In order to pay the taxes, he initially decides to auction off the mansion and its contents, but then he discovers a massive computer (the Generalized Nonlinear Extrapolator, or "Genie") that can bring any situation or time to life.
August 1984 : USA Mass Market Paperback
March 2016 : UK Kindle edition
Title: The Great Time Machine Hoax
Author(s): Keith Laumer
Availability: Amazon UK