The Next -- the hyper-intelligent post humans -- realize that the missive they received from the center of the galaxy contains instructions for kick-starting the development of an immense artificial intelligence knows as The Machine. But to build this computer the size of an Earth continent, they must obtain help from the more populous and still industrious worlds of mankind.

A new America called Valhalla grows restless under the controlling long arm of the Datum government, while all of the Long Earth is infused by the song of the trolls who are starting to react to humanity's thoughtless exploitation, bringing humankind to the brink of war.

After plummeting through a hole in her backyard and finding herself once again in the room of mysterious jars, eleven-year-old Olive unwittingly releases two of Elsewhere's biggest, most cunning, most dangerous forces.

Candy Quackenbush of Chickentown, Minnesota, is the only person who can stop the evil Mater Motley who, now that the hour of midnight has come, is prepared to unleash the end of the world.

Tolly comes to live with his great-grandmother at the ancient house of Green Knowe and becomes friends with three children who lived there in the seventeenth century.

The Reality Dysfunction is a modern classic of science fiction from Peter F. Hamilton, an extraordinary feat of storytelling on a truly epic scale.
 
"A space opera that is big, boisterous, and has something for everyone." —Science Fiction Weekly
 
Space is not the only void. . .
In AD 2600 the human race is finally beginning to realize its full potential. Hundreds...

Charles Yu, time travel technician, helps save people from themselves in Minor Universe 31, a vast story-space on the outskirts of fiction. When he's not taking client calls, Yu visits his mother and searches for his father, who invented time travel and then vanished. Accompanied by TAMMY, an operating system with low self-esteem, and a nonexistent but ontologically valid dog named Ed, and using a book titled "How to Live Safely in a Science Fictional...

"The third novel in Terry Pratchett and Stephen Baxter's "Long Earth" series, which Io9 calls "a brilliant science fiction collaboration."-- When her long-lost father, the inventor of the original Stepper device, contacts her, Sally joins him on an ill-fated voyage to Long Mars, while U.S. Navy Commander Maggie Kauffman leads an expedition to the outer limits of the far Long Earth, and Joshua becomes embroiled in the plight of the Next.

Relates what happens to three American children, unwillingly transplanted to Wales for one year, when one of them finds an ancient harp-tuning key that takes him back to the time of the great sixth-century bard Taliesin. In an ideal blend of absorbing fantasy and realistic fiction, A String in the Harp tells the story of 12-year-old Pete Morgan who, on a visit to Wales, finds a harp key that shows him scenes from the life of the ancient bard Taliesin....

Failing to eliminate life on Earth after their first attack, the Firstborn send a Q-bomb weapon to finish the job. Two cryogenically frozen females and a group of scientists studying the Eye, an artifact of the Firstborn, may be the only hope of finding a way to counter the onslaught.