Hugh Farnam makes good preparations for his family to survive a nuclear holocaust, but are the preparations good enough to survive a trip to the future?

In his blog, Fred Pohl wrote about how Heinlein’s agent gave permission for Pohl publish the novel in If and to cut “five or ten thousand words in the beginning that were argumentative, extraneous and kind of boring” (and Pohl agreed to pay full rate for the cut words). But apparently, Heinlein “went ballistic” when he saw the first installment, so much so that when the book appeared as a separate publication, Heinlein made sure people knew who was responsible for the previous cuts by adding a note* that “A short version of this novel, as cut and revised by Frederik Pohl, appeared in Worlds of If Magazine.”

* The version of Heinlein’s note that Pohl recalled was much funnier than Heinlein’s actual note in our timeline, but sadly, we have lost track of where we saw Pohl’s version.

Semi-mad scientist Jake Burroughs, his beautiful daughter Deety, her strong love interest Zeb Carter, Hilda Corners (“Aunt Hilda” if you prefer) and their time/dimension-traveling ship Gay Deceiver yak and smooch their way though many time periods in many universes (including that of Lazurus Long), soon realizing the true nature of the world as pantheistic multiperson solipsism.

In Heinlein’s first version of this novel, written in 1977, the middle third of the story takes place on Barsoom, but in the 1980 published version, Barsoom was replaced by a futuristic British Mars