12 Miles Below: Cool World, Middling Payoff

12 Miles Below book cover by Mark Arrows

Mark Arrows' 12 Miles Below drops you on a future Earth where the surface has frozen into a straight-up deadly ice waste, and humanity's split between fragile surface clans and whatever the hell survived down in the depths. Follows Keith Winterscar and his dad after an expedition goes sideways — and the setup alone is one of the more striking premises I've run into in this genre.

The best part is the world

The Depths aren't just tunnels — it's this massive, shifting underground maze that acts more like a living machine than actual rock, packed with scavenged tech, rune-like systems, and things that are less "monster" and more "demigod." Treating high-tech sci-fi shit like a magic system is a neat trick, and the surface-versus-depths contrast gives the whole series its own identity.

[Where it lost me a bit] The concept and setting carry a ton of weight here — the weak-to-strong growth and survival stakes are all present and correct, but it just didn't grab me on a character level the way my favorites do. Good, not great.

Worth a listen for the world-building alone if frozen-apocalypse settings and scavenged-tech progression are your thing. Just didn't climb higher than a 6/10 for me overall.