The Long Mars

In the third installment of the Long Earth series by Terry Pratchett and Stephen Baxter, set in 2040, civilization is unraveling in the aftermath of the Yellowstone eruption, prompting mass migration across alternate Earths. Joshua Valiente finds himself grappling with societal fear and conflict as a new breed of super-intelligent post-humans emerges, while U.S. Navy Commander Maggie Kauffman sets out on a daring expedition into uncharted realms. Simultaneously, Sally Linsay reconnects with her estranged father, who has his own ambitious plans across the Long Mars. In this tumultuous landscape, the future of humanity hangs in the balance as tensions rise between the "normal" and the "Next."