The Decagon House Murders (
Jukkakukan no Satsujin) is a
mystery. I got it via interlibrary loan.
Review:
The one other book by Ayatsuji that I'd read,
Another, was interesting enough that, when I heard
The Decagon House Murders (originally published in 1987) had been translated, I knew I wanted to read it. In some ways it turned out to be better than
Another, but in some ways it was worse.
In
The Decagon House Murders, we have a setup in which seven friends who are all part of their university's Mystery Club decide to spend a week on Tsunojima Island. They stay in the Decagon House, a house built in a decagonal shape. It had been designed by the island's previous owner Nakamura Seiji (the translator left all Japanese names in their original order).
Just as Seiji had designed the Decagon House so that it and everything in it, including the mugs in the kitchen, was decagon-shaped, so had he also designed the Blue Mansion. It and everything inside it had been entirely blue. However, it had burned down a while ago. The way the story went, Nakamura Seiji's gardener had killed Seiji's wife and cut off her hand, then killed Seiji and a servant couple that lived in the house, and then burned the entire house down. The gardener had never been found. The Mystery Club thought it might be interesting to stay on an island where such a thing had occurred, just a harmless thrill. However, on the second day they discover seven plastic plates with “The First Victim,” “The Second Victim,” “The Third Victim,” “The Fourth Victim,” “The Last Victim,” “The Detective,” and “The Murderer” painted on them.
Meanwhile, Kawaminami, a former member of the Murder Club, has received a strange letter claiming that Nakamura Chiori had been murdered by “all of you.” Chiori, another Murder Club member, had died over a year ago, from a combination of alcohol poisoning and a bad heart. Kawaminami learns that another club member got a similar letter, prompting him to begin investigating. Was it really sent by Nakamura Seiji, Chiori's father? And if he's still alive, then what really happened in the Blue Mansion?