Outrageous Fortunes: a Novel of Alternate Histories by Steven W. White
Approx. 87,700 words.
Published on March 27, 2011.
Shy amateur historian Randy Sullivan, age 23 and unhappy with his life, is approached by his double from a parallel Los Angeles, a bombastic physicist and inventor who calls himself "Sully." Together they step out of this reality and visit versions of Earth stranger than Randy has ever imagined... and those so eerily close as to be just out of reach.