Long Utopia, A Novel, HarperCollins, Terry Pratchett,Dystopian and utopian fiction,Speculative fiction, two authors; battle mars; future; humor; joshua valiente; journey; library; longstang; mars; pratchett; space travel; toget; valhalla; fantasy; long earth; multiverse; parallel universes; parallel worlds; long earth 4; collaborationsci-fi; collaboration,, Long Earth, United States, en-UShttps://www.harpercollins.comtwo authors; battle mars; future; humor; joshua valiente; journey; library; longstang; mars; pratchett; space travel; toget; valhalla; fantasy; long earth; multiverse; parallel universes; parallel worlds; long earth 4; collaborationsci-fi; collaboration, [BLURB],[CITY],,books, ebooks, biblet, Book2look