Pre-publication record based on author comments in a press release in 2020. Go Marching In is set on a dying, post-cyberpunk Earth that’s been abandoned by the rich, who fled in generation ships. Muir describes the book as the start of “my novella series featuring Teresa Santos: a world-weary gunslinger who’s stopped hoping to escape Earth before it melts, and all the women who, for reasons unexplained, loved her.”