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1) Pratchett, Terry and Stephen Baxter. The Long Utopia: A Novel. 2015. Harper. Hardbound: 355 pages. Price: $26.99 U.S.
PUBLISHER'S SUMMARY: It is the middle of the twenty-first century.
      After the cataclysmic upheavals of Step Day and the Yellowstone eruption, humanity is spreading farther into the Long Earth. Society, on a battered Datum Earth and beyond, continues to evolve.
     And new challenges emerge.
     Now an elderly and cantankerous AI, Lobsang is living with Agnes in an exotic, far-distant world. He's determined to lead a normal life in New Springfield—they even adopt a child. But there are rumors, strange sightings in the sky. On this world, something isn't right. . . .
    Millions of steps away—learning about a hidden family history and the father he never knew—Joshua receives an urgent summons from New Springfield.
    Lobsang has come to understand that what has blighted his Earth is also a threat to all the worlds of the Long Earth. Countering this threat will require the combined efforts of humankind, machine, and the super-intelligent Next. And some must make the ultimate sacrifice. . . . 
RECOMMENDATION: Fans of the Long Earth series should enjoy this book.