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The dazzling new science fiction adventure from the extraordinary imaginations of Terry Pratchett and Stephen Baxter - the fourth novel in a collaborative series that has been hailed as ´sense-of-wonder SF at its best´ (Independent on Sunday).

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2045-2059. After the cataclysmic upheavals of Step Day and the Yellowstone eruption humanity is spreading further into the Long Earth, and society, on a battered Datum Earth and beyond, continues to evolve.
Now an elderly and cantankerous AI, Lobsang lives in disguise with Agnes in an exotic, far-distant world. He´s convinced they´re leading a normal life in New Springfield - they even adopt a child - but it seems they have been guided there for a reason. As rumours of strange sightings and hauntings proliferate, it becomes clear that something is very awry with this particular world.
Millions of steps away, Joshua is on a personal journey of discovery: learning about the father he never knew and a secret family history. But then he receives a summons from New Springfield. Lobsang now understands the enormity of what´s taking place beneath the surface of his earth - a threat to all the worlds of the Long Earth.
To counter this threat will require the combined efforts of humankind, machine and the super-intelligent Next. And some must make the ultimate sacrifice . . .

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"There´s plenty of fun to be had from this ... a hymn to the joys of unfettered world-building ... but if the pace of plotting is gentle, the restless inventiveness more than compensates." (Adam Roberts GUARDIAN)

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Sir Terry Pratchett, the author of over three dozen novels, was one of the worlds best-selling novelists writing in the English language. His books have sold more than 65 milllion copies worldwide. In addition to his phenomenaland hugely popular Discworld series for adults, Terry Pratchett is the beloved author of several childrens books. He was awarded Britains highest honor for a childrens novel, the Carnegie Medal. In 2008, he was knighted by Queen Elizabeth II for his services to literature. Terry lived in England, where he wrote all the time. The characters and setting of THE TIFFANY ACHING ADVENTURES are dear to the authors heart, reflecting (obliquely) much of his own childhood in Englands Chalk countrythe part of the country where he has lived. In 2008, Terry Pratchett was diagnosed with early onset Alzheimers Disease. He died in 2015.

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