What is the main setting in the novel, All the Myriad Ways?

With the exception of the ability to travel across time, the first glimpse of DetectiveLieutenant Gene Trimble's world seems very similar to twentieth-century America. As the narrative of "All the Myriad Ways" advances, it becomes evident that there are distinct differences between the history presented in the story and actual events that happened in the twentieth century. References to the Cuba War and eradicated cities give the reader clues that not only is "All the Myriad Ways" about alternate timelines, but it in fact takes place in an alternate timeline.