What if there's a stable red dwarf system inside a supermassive black hole, where an advanced civilization has evolved?As an astrophysicist who studies supermassive black hole mergers, I've written a hard science fiction novel exploring this fascinating possibility.In the novel, when astrophysicist Chang-Geng Zhang's Mars mission goes catastrophically wrong, she finds herself trapped inside a supermassive black hole-where an advanced civilization has somehow survived and thrived around a red dwarf star. With only a cat named Victor as her companion from Earth, she must navigate alien politics, genetic modification, and the fundamental question of what makes someone human when consciousness can be transferred between bodies.Some of the concepts explored in the novel: