The Long Earth, written by Terry Pratchett and Stephen Baxter, is a unique space pirate adventure saga that explores the concept of parallel universes. The story follows Joshua Valiente, a man who can traverse these alternate Earths, as he embarks on a journey of discovery and encounters various dangers along the way. With its imaginative premise, rich world-building, and exploration of the human desire for exploration, The Long Earth offers a captivating space pirate adventure.