The City & The City is for the Venn diagram of people who like Raymond Chandler and science fiction. It’s a mystery, a police procedural, that involves two cities that exist in the same space but in different dimensions. Sort of. The bureaucracy that governs the two cities is Kafka-esque.
The mystery could stand on its own, but would be way less intriguing without the odd Eastern European dual-citied setting. It allows for twists and turns and part of the intrigue is figuring out how the two cities coexist. Allow for some mind-twistiness with this one.