After mastering the ability to walk between dimensions, sixteen-year-old Joey Harker and his fellow InterWorld freedom fighters embark on a mission to maintain peace between the rival powers of magic and science who seek to control all worlds.

"When eighteen-year-old Marguerite Caine's father is killed, she must leap into different dimensions and versions of herself to catch her father's killer and avenge his murder"--

Novel about transmigration of the soul, Darrell Standing is condemned to solitary confinement in a corrupt prison. He discovers how to free his soul from his body and escapes through time and space to relive the experiences of his past lives which include a caveman, a Danish soldier, a French swordsman, and an American pioneer boy.

Ragle Gumm thinks that it is 1959, that he lives in a small town, and that he is a whiz at newspaper puzzle contests. A series of hallucinations make him begin to doubt all of these things.

"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.

Robert Metzger writes classic hard SF but he does so in a way that emphasizes excitement and adventure and which shows the science in a way that makes it accessible and fascinating. In PICOVERSE, a team of physicists in 2007 is trying to develop fusion power via a new development in plasma physics, a Sonomak, but accidentally stumbles on a method to create new, smaller-than-usual universes, which they call picoverses. These replicate everything in...

Fifteen-year-old Jack is sent to 1914 Europe as a pawn in the battle between his long-lost father, who has built a time machine, and a secret network of scientists who want to prevent him from trying to use it to change history for the better. Includes historical notes.

Two children are hurled into the future as a result of their hunt for three 12-foot stones missing from an ancient Scottish stone circle.

When twins Abby and Derick start junior high at the prestigious academy their grandfather founded, Cragbridge Hall, they discover firsthand the dangers of time travel and must find a way to save their parents, who have been sent to the Titanic the night it sank.

When an elderly customer at a Swedish big box furniture store -- but not that one -- slips through a portal to another dimension, it's up to two minimum-wage employees to track her across the multiverse and protect their company's bottom line. Multi-dimensional swashbuckling would be hard enough, but those two unfortunate souls broke up a week ago. To find the missing granny, Ava and Jules will brave carnivorous furniture, swarms of identical furniture...