The Long Earth is a collaborative science fiction novel series by British authors Terry Pratchett and Stephen Baxter.
[3] The success of The Colour of Magic prompted Pratchett to put the story aside in favour of working on The Light Fantastic.
[3] The idea resurfaced in late 2010 following a dinner conversation with his assistant and American agent, and discussion with Stephen Baxter prompted the development of the first book in the series, The Long Earth, and the collaboration between the two authors.
Although Pratchett has written some science fiction, he is primarily known for his fantasy series of Discworld novels.
Despite this they all share one similarity: on none are there or have there ever been humans — although some are inhabited by earlier hominid species such as Homo habilis.