Inspired by the classic SF device of the time machine, post-WWII mass-market works discuss the possibilities and pitfalls of time travel and include sub-genres, such as alternative history, that envision different pasts and presents.
At the height of America's secular decadence came Nehemiah Scudder, bearing the rod and wrath of the Lord for those who opposed him, and the promise of earthly happiness and heavenly bliss for those who followed him... and America fell under an absolute religious dictatorship that was to last a hundred years. But nothing endures forever. The smoldering embers of liberty have burst into flame again. It is time for a new beginning.
The "civilized" government of the planet Missouri was overthrown by revolutionaries who have embraced the lifestyle and culture of the United States' Old West frontier. Suspicious of technology, the denizens of Missouri nevertheless ride robot horses and drink synthetic liquor to pass the time on a planet whose main source of income comes from exporting western souvenirs (i.e. miniature outhouses, wagons, revolvers, etc.), staging gunfights for tourists, and providing "living antiques" in the form of gunfighters being placed on other planets as zoo specimens.
What if Adolf Hitler's failed 1919 political aspirations had driven him into exile in the USA? What if instead of becoming a dictator, he became a science fiction writer? This novel is science fiction as written by that alternate universe Hitler.
Custer's loss at Little Bighorn is just the beginning of a route of the US Army. The tribes consolidate their power and establish their own separate nation so that in the present day they are a nuclear state within the US.
On August 12, 1992, England's tiny nuclear arsenal fell on Ireland, on South Africa, and finally on China. Instantly, the planet went up in flames. In the first half year of what was to be the War of '92, half the Earth's population perished. The United States was reduced to a vast under peopled land-and, to make matters worse, Texas had seceded and taken her precious oil reserves. But Israel, virtually untouched in a world ravaged by war, was painfully overpopulated. So Sol Iglestein and Myra Kalen had come to America looking for a place to settle. As mercenaries on the side of the Union in its war with Texas, the Israelis had been promised land in exchange for their services. Leading their begraggled troops into the heartland of Texas, Sol and Myra head up Operation King. Mission: Rescue the President of the United States!
1984 is the good old days. On America's campuses professors hawk their courses, dozens of political groups compete in violence and computer-dating means having sex with a computer. It may not be all grind, but it isn't fun and games- as one senior finds out when he kidnaps his favorite professor- and kills him for his knowledge.
On the arid colony of Mars the only thing more precious than water may be a ten-year-old schizophrenic boy named Manfred Steiner. For although the UN has slated "anomalous" children for deportation and destruction, other people--especially Supreme Goodmember Arnie Kott of the Water Worker's union--suspect that Manfred's disorder may be a window into the future.
Sent back in time to record a speech by Abraham Lincoln, Ben Steward learns that he has been transported twice--on two consecutive days--and that his double still exists in the same time zone.
When the Yellow Alert flashed, all flights from O'Hare Jetport were postponed indefinitely. Of the thousands of people waiting there nervously, only fifteen escaped in the sudden nuclear blast that destroyed life on Earth. The fifteen lived because they had been transported 50,000 years back through time -- to just before an earlier Doomsday. Who brought them there? Why did the chosen few include a hired killer disguised as a priest, a religious fanatic, a woman who poisoned her husband's blueberry muffins, a slumlord, a lecturer, and a farm worker? And what did their kidnappers mean by telling them they were in training for THE DAY AFTER DOOMSDAY?
Karl Glogauer is a disaffected modern professional casting about for meaning in a series of half-hearted relationships, a dead-end job, and a personal struggle. His questions of faith surrounding his father's run-of-the-mill Christianity and his mother's suppressed Judaism lead him to a bizarre obsession with the idea of the messiah. After the collapse of his latest affair and his introduction to a reclusive physics professor, Karl is given the opportunity to confront his obsession and take a journey that no man has taken before, and from which he knows he cannot return. Upon arriving in Palestine, A.D. 29, Glogauer finds that Jesus Christ is not the man that history and faith would like to believe, but that there is an opportunity for someone to change the course of history by making the ultimate sacrifice.