In the final novel of the award-winning sci-fi saga, both humans and aliens face destruction as a new time-portal opens a path back to the twenty-second century

In Pliocene Europe, warring races of aliens and humans face a new threat from North America in the third novel of the Locus Award–winning sci-fi series. A gro

Second in the series that portrays “one of the best-thought-out futures ever encountered in science fiction” from the author of The Many-Colored Land (Joe H