Locked in Time

“Time was something that largely happened to other people; he viewed it in the same way that people on the shore viewed the sea. It was big and it was out there, and sometimes it was an invigorating thing to dip a toe into, but you couldn't live in it all the time. Besides, it always made his skin wrinkle.”

"Thief of Time"

Okay, it's almost summer now so a snow cover might seem a bit weird, but was still winter when I read this book...

Three years ago, Japan saw its first trial of a locked room murder case. The police and prosecution knew they had the right person: every piece of evidence they could find pointed towards the defendant, the only person near the crime scene who had anything remotely like a motive. However, there was one problem: they could never figure out how the locked room murder had been executed. They tried and tried, but could not explain how the defendant could've murdered the victim, and then left the room, as it was found locked tightly from inside. The prosecution argued this was a moot point: every thing else pointed at the defendant, and the locked room itself was a just a parlor trick and not relevant to the case at hand. The judge, naturally, did not agree with this argument. The prosecution failing to explain how the locked room was created, basically provided the defendant, and everyone else for that matter, with an alibi. How could the defendant have committed the murder if by all accounts, they couldn't have left the room afterwards? The defendant was found not guilty and with that, the Golden Age of Locked Rooms started in Japan. For all would-be murderers realized that if they managed to pull off a locked room murder the police couldn't solve, they'd always get away, even if they managed to find other evidence implicating them. After the first locked room murder, Japan saw a rise in the number of locked room murders in the country, which also urged society to adapt: locked room specialists appeared, ranging from architects to detctives and the Ministry of Justice even compiled an official list of all existing types of locked room tricks. On the other side, cults appeared that started to worship locked room murders as a way to mourn the dead.

Kuzushiro Kasumi is roped in by childhood friend to Yozuki to visit the House of Snow, a hotel somewhere in the mountains that used to be the private residence of a famous mystery writer. Yozuki is here because of a local Yeti-sighting, but Kasumi's interest lie within the hotel's history: Ten years ago, the mystery novelist who lived here held a party, and during the party he enacted a locked room murder: a "murdered" doll was found inside a locked room of which the key was found inside a bottle next to the victim. Nobody managed to solve the mystery, but it soon became a legend among fans of detective fiction, and even after the house got a new owner who turned it into a hotel, the "crime scene" was preserved and mystery fans still visit the hotel to try to solve the puzzle themselves. The hotel is also extremely popular due to the cooking skills of the owner and basically always booked full. Arriving at the hotel, Kasumi and Yozuki meet some of the other colorful guests, like the 15-year old Riria, an actress who everybody knows. Kasumi's interest is initially only focused on the murder game of 10 years ago, but then a real locked room murder occurs in the hotel, and of course, the usual happens: a snow storm arrives, the phone lines are cut and the one connecting bridge to the other side of the cliffs back to the main road also collapses. Everyone is now trapped inside the Hosue of Snow, and the killer is likely one of them. In the three years since The Golden Age of Locked Rooms started, most people have become somewhat familiar with locked room murders, so some guests try to solve the mystery themselves, but more and more murders follow, and always under impossible circumstances. Teaming up with a somewhat reluctant Mitsumura Shitsuri, a former classmate and fellow club member who happens to be staying at the hotel too, Kasumi too tries to solve the many murders that occur in Kamosaki Danro's 2022 debut novel Misshitsu Ougon Jidai no Satsujin  - Yuki no Yakata to Muttsu no Trick, or like the cover also says: The Murder in the Golden Age of Locked Rooms - The House of Snow and the Six Tricks.

I'll be the first to admit that it was the title, and a quick glance at the summary, that immediately convinced me I wanted to read this book. The premise of a new age in society, where so many murderers commit locked room murders even the government has to compile its own "locked room lecture", just sounded so incredibly fun, with so much potential to get incredibly meta. Which is perhaps I was a bit disappointed once this book got going. For while the concept of The Golden Age of Locked Rooms is relevant to the story's main plot in several ways, it does feel like this book doesn't quite make full use of the potential of the premise. This is for a large part due to the setting of the book: The Murder in the Golden Age of Locked Rooms - The House of Snow and the Six Tricks is a classic closed circle situation mystery, with the characters stuck in the House of Snow due to a heavy snow storm/collapsed bridge, so ultimately, you don't really get to see much of modern day society that is now experiencing The Golden Age of Locked Rooms. Sure, the characters mentions locked room murders, and among the other hotel guests, you have a locked room murder detective and even someone from the Tower of Dawn, a cult worshipping locked room murders, but it's such a shame we don't really get to see how The Golden Age has really changed society at large, we only get to see very limited snippets of these changes. Would the book have felt very different if it were just set in "normal" times, but with characters who all happen to be locked room murder mystery fans? Probably not very much, and that's where I think the concept of The Golden Age of Locked Rooms has a lot of unexplored potential.

The title reveals of course that this book is about six different locked room murders, with six different tricks utilized to create those situations. Some of these happened in the past (like the murder game organized by the mystery writer ten years ago), some are the current murders. The book is not very long, so you can imagine that the story does kinda rush through all of these murders. I think I can definitely feel the love of the author for mechanical trickery behind locked room murders though. None of the locked rooms featured here are pulled off based on some kind of psychological trickery, like fooling people into thinking a door was locked when in fact it was not: all the doors in this book are properly locked through some kind of mechanical trickery of the needle and string variety. I do have to say that even though mechanical tricks can be kinda tricky to understand because usually there are a lot of moving parts (strings being pulled and moved, for example), I'd say that for a debut novel, Kamosaki does a good job at explaining each trick rather clearly and easy to follow. I've definitely read work by authors who don't write as clear when it comes down to these kind of tricks. The book in general is very easy to read through, though some might not be very much into little techniques to make the reading so smooth, like using simple, "obvious" naming conventions for the characters, basically in the spirit of a manager being named M. Anager. Not surprisingly, the book has a distinct, often light-hearted tone like you'd expect from a light novel.

As for the six locked rooms, I'd say they're... okay? The various locked room murders aren't really connected to each other, as in, it's not like elements in one locked room situation will help you solve another locked room or anything like that, so you basically have six discrete situations. Some are more interesting than others, though I have to say that due to the short runtime of the book, most situations don't really get much time to settle: usually something happens, Mitsumura and Kasumi have a look around and by then they've already solved much of the how of the mystery, because of course the next locked room murder is already waiting around the corner. As mentioned above, the individual locked rooms are very much focused on mechanical trickery and a lot of them do feel like (combinations of) variations of ideas you'll probably have seen elsewhere before, but for the most part, I found this an entertaining book. I do also like the fact that the whodunnit is also given proper attention, implementing classic Queen-style deductions chains that look at things the murderer must have done to create said murder situation and then examining those actions to determine who couldn't or wouldn't have done those things in order to cross off names of the suspect list until you arrive at the murderer. Some of the deductions feel a bit forced (especially the premise that allowed for the final step in identifying the murderer at the very end), but in general, it'd sayt that despite its focus on the how of the murders in terms of premise (and title), the whodunnit aspects feel a bit more impressive: the focus on the mechanical trickery behind six locked rooms do make some parts feel a bit samey, which is less so in the whodunnit parts of the book.

The Murder in the Golden Age of Locked Rooms - The House of Snow and the Six Tricks is obviously written by someone who loves locked room murder mysteries and for a debut novel, it certainly has a lot of interesting ideas. While the full potential of the concept isn't explored in this book, I do like the idea of the Golden Age of Locked Rooms, and having six servicable locked room situations in any debut novel would be quite a feat. This book might not be a true classic of the genre, but I did enjoy reading the book and I'm definitely interested to see what Kamosaki will release in the future.

Original Japanese title(s): 鴨崎暖炉『密室黄金時代の殺人 雪の館と六つのトリック』