“This” being the alternate history book WINTER OF OUR DISCONTENT: The Impeachment & Trial of John F. Kennedy, Written by Harry Turtledove & Bryce Zabel, which postulates as its divergence point the failed assassination of JFK. They’ve got three chapters up at the site, and it looks like a pretty good story – but there hasn’t been any action on this for almost two years, which seems a shame. Harry Turtledove