- Many of the tricks were clever, like the sliding panel to a secret passage tthat is used inside a room to stab/murder someone in the locked room with remote control or the door swap (similar idea to key swap but bigger) or ice to set up dominos, etc. I think some of these are a little implausible - ex, its not that easy to carry an entire door by yourself and not make a lot of noise and set it up perfectly, but I think the ingenuity is there.
- The evidence was presented upfront like Fenrir Alicehazard being only one to go out in the snow, and thus she was the only one who could've seen Riria open her phone in her special way in order to get the special murder playing cards to leave at scene. Same with the tape left on the door that disappeared once the door was swapped back or the knife in the earlier locked room used to slice off the band or the sound recording playing masking the sound of the bottle sliding across the room.
Disliked:
- I don't know if it's the fan translation or the author themself (I suspect the author), but there's many times when the book repeats the same line or idea excessively.
Let me give an example in the final chapter, during the discussion of the window used to look and see Riria the murder idol's hiding spot of the card: "Because there is only one person who was able to look into Miss Riria's room...There was only one person who could look through the window. That was the same as saying there was only one person who could have murdered Yashiro...There was only one person able to look into Riria's room?...Strictly speaking, there was only one person able to look into Miss Riria's room."
So basically the same sentence is repeated 4 times and this was only in about 2 pages of space. That's VERY unnecessary and could've been pared down/edited to flow better. There's also the sentence that explicitly says it's Yashiro's murderer that was obvious and could've been written in smoother. So reading this is kind of like Ellery Queen where ideas are clever, but the writing is clunky and verbose.
This was only one example by the way, the book does this in other sections too.
- Toward the end, there's the 15 Methods for Locked Rooms, and the main character goes through all of them for the final locked room. I don't think this added much, and some of explanations for them could've been condensed. Ex, he says #X doesn't work for the same reason as #5 or so, so he could've just said #X and #5 don't work because of Y reason and left it there. In general, I think it wasn't necessary, and he could've just said "It doesn't fit any of the 15 methods because X/Y/Z reasons, but here's this 16th method, etc", and that would've sufficed and been a lot shorter and succinct.
- Flashbacks.
I hate flashbacks because they take you out of the moment of a story - nothing in them has impact on the present, and if there is a flashback, I prefer it to be abridged. Some of the flashbacks aren't THAT long with MC Kuzushiro reminiscing about his school days with his old genius friend Mitsumura, before she committed Japan's first locked room that entered a court case, but they still feel bogged down, esp when there's SO many flashbacks.
I think there was one flashback every 3 chapters or so. I hated that and wish it was either taken out or abridged. I get why its important for setting up FMC and her relationship with MC, but I don't think there enough payoff for how much time we spent in the past. I always dreaded the flashback scenes because who cares what they did in school with books and board games? Ugh.
- Some tricks are hard to picture or a smidge mechanical.
I understand the general premise of how the locked rooms were committed, but some like the bottle initially with the band and knife and music player and window are still hard to picture. Same with other trick where liquid nitrogen was used to freeze a bunch of stuff. It works, but it took some thinking.
Also, I am not certain about the bottle one where it was hidden by the carpet at the door. So the MC and others don't see the bottle at the bottom of the door because of the carpet? I am not sure how fair that is.
But eh, it's extremely fair and comprehensive (eliminating other possibilities) in other places, far more than western mysteries.
Overall:
The idea of a Japan where Locked Rooms become a common murder method to escape the law and commit murder is interesting, same with having legitimate Locked Room Experts who analyze them or Locked Room Detectives who solve them. A lot of the tricks are really clever, and the mystery does a good job of being fair and giving readers a chance to solve many of them.
The writing holds this back, though I'm not sure if that's partly due to translation - I suspect it's the author though since the book does this a lot, and the translator is very good and experienced. The characters are nothing to write home about, though there's some lingering humor like Yozuki coming to the place to look for bigfoot or everyone making fun of Kuzushiro's intelligence, saying it doesn't fit him when he looks smart, etc.
Re:translation itself - the core translation, editing, polish, etc are all top notch for a fan translation.
Anyway, overall, I'd say the book is a good locked room mystery if you're into the subgenre or if you like clever fair-play tricks and such. There's issues, but it's a smarter mystery than any western mystery I've read this year by miles.
3/5 stars which is a good score for me.
This entire review has been hidden because of spoilers.