The central hook of the series is . In this world, ecosystems have been replaced by a mechanical hierarchy. Large "Traction Cities" like London roam the Great Hunting Ground, chasing down and dismantling smaller "prey" suburbs to scavenge fuel, metal, and slaves.
: It is perhaps the most ambitious modern example of steampunk, blending Victorian-era social structures with futuristic, rusted technology. MГЎquinas Mortales
: The film is widely praised for its incredible world-building and visual effects. The sight of a multi-tiered, steampunk London "eating" a small mining town remains a landmark piece of CGI. The central hook of the series is
: A low-tier apprentice historian from London who has spent his whole life inside the moving city. His worldview is shattered when he is pushed off the city and forced to survive on the "Out-Country" floor. : It is perhaps the most ambitious modern
In 2018, the world was brought to the big screen, produced and co-written by (of Lord of the Rings fame) and directed by Christian Rivers.