The Earth has gone to an unhabitual state and a network of spheres that encircle it is the setting of the science fiction Tion series by J.C. Gemmell. The third book, Demiurge, continues the story of the haves and have-nots that occupy levels within the man-made Tionshphere. The small number of humans saved after the planet's collapse has ballooned over a thousand years, compounded by immense longevity of life. People are completely reliant on being connected to one another, and a life of disconnection is inconceivable. A deluge has nearly paralyzed the system and connectivity has been scaled back significantly, and more to some than others depending on the level one lives in. A data broker named Kathy has the power but the resistance is on the cusp of devising another. Who the people choose to follow, what they are willing to live with and without, and how it all comes to a head sets the tone for Demiurge.
Social media which is virtually all that people live for does not seem to require the same degree of suspension of disbelief that most science fiction novels have, nor does the issue of a population that has outgrown itself. For me, the first two books in the Tion series, Tionshphere, and The Uprisers, reminded me of Le Transperceneige, the book that sparked the series Snowpiercer, as the levels of where people live in the Tionshphere does have huge class division. Overpopulation leads to a culling of unnecessary people and the fight of the uprisers, which has a dual meaning as revolutionary but also people literally rising to the surface, and how this all works is pure J.C. Gemmell and fabulously unique. The scenery in Demiurge is top-notch and Gemmell carries forward with tight and engrossing prose. There are so many directions that the series can go and plenty of characters worthy of their own spin-offs. I'm just thankful to be along for the ride.