The Long Utopia by Terry Pratchett

In this imaginative continuation of the series, the narrative explores the vast expanse of parallel Earths, known as "The Long Earth," where humanity has spread across countless worlds. As the story unfolds, a new threat emerges from the depths of these alternate realities, challenging the very fabric of existence. The protagonists, including the ever-curious Lobsang and the intrepid Joshua Valienté, must navigate this complex multiverse to uncover the truth behind this mysterious danger. Along the way, they encounter unexpected allies and adversaries, each with their own agendas, as they strive to protect the future of all worlds.