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.
Used availability for Keith Laumer's The Great Time Machine Hoax
Paperback Editions
August 1984 : USA Mass Market Paperback
Kindle Editions
March 2016 : UK Kindle edition