The Long Earth Series, Terry Prachett, Stephen Baxter

"The Long Earth" series is a collaborative science fiction series written by British authors Terry Pratchett and Stephen Baxter. The series explores a multiverse concept where an infinite number of parallel Earths, collectively known as "The Long Earth," are accessible to humanity through a simple device called a "Stepper. "The series begins with the novel "The Long Earth," published in 2012, where the discovery of the Stepper leads to a new era of exploration and colonization as people start "stepping" across alternate Earths.

The story primarily follows Joshua Valiente, a natural stepper, and Lobsang, an artificial intelligence in a human-robot hybrid body, as they embark on a journey through the Long Earth. Subsequent books in the series further develop the exploration of the Long Earth and its implications for humanity. These include:1.

"The Long War" (2013): Continues the exploration of the Long Earth as tensions rise between the Datum Earth (the original Earth) and the expanding settlements in.