Clark, Ronald W. The Bomb that Failed [vt The Last Day of the Old World]
Divergence: 1945 CE
What if: The Trinity test was a failure, due in part to Klaus Fuchs.
Summary: An agonizing invasion of Kyushu leads to US use of rice fungus bombs, and the Soviets exploit border incidents for a drive on the English Channel.
Published: As The Bomb that Failed, Morrow 1969.
Published: As The Last Day of the Old World, Cape 1969.