Nearly six decades after Step Day and in the Long Earth, the new Next post-human society continues to evolve. For Joshua Valienté, now in his late sixties, it is time to take one last solo journey into the High Meggers: an adventure that turns into a disaster. Alone and facing death, his only hope of salvation lies with a group of trolls. But as Joshua confronts his mortality, the Long Earth receives a signal from the stars... A novel that comes across as a love letter to science fiction itself.