A brilliantly constructed Japanese psychological mystery by the enigmatic author Uketsu, translated into English by Jim Rion. It is the follow-up to Strange Houses and continues Uketsu's signature style of combining architectural puzzles with chilling psychological suspense.

The novel presents eleven seemingly unrelated buildings, each with an unsettling floor plan and a disturbing backstory: a lonely hut deep in the woods, a murder house, a hidden chamber, a mysterious shrine, a house consumed by fire, a prison-like structure, and more. Each location conceals an architectural anomaly that hints at a terrible crime or long-buried secret.

As an occult writer investigates these strange case files, the reader is invited to solve the mysteries by studying the buildings' layouts and clues. Gradually, the separate stories begin to connect, revealing a larger conspiracy and a shocking final truth that ties all eleven buildings together. The novel blends detective fiction, horror, and puzzle-solving into an interactive reading experience unlike a traditional thriller.