The Long Cosmos

This book is the fifth and final installment in The Long Earth series. While it continues the overarching narrative, it also brings many of the series' long-running plot threads to a conclusion.

The Long Cosmos is part of a science fiction series co-written with Stephen Baxter, a significant departure from Pratchett's well-known Discworld fantasy novels. It explores different themes and a distinct universe, showcasing a different facet of his writing.

Yes. The Long Cosmos is the fifth and concluding novel of the Long Earth series. It was published in June 2016 by Doubleday, posthumously after Pratchett's death in March 2015.

The phrase 'JOIN US', transmitted across the Long Earth, forms the inciting mystery of the novel — an invitation from an intelligence far larger than anything humanity has encountered before.

Stephen Baxter continued the collaboration after Pratchett's death and completed The Long Cosmos. Baxter and Pratchett had been friends and creative partners for many years before the series began.