I’d be rather surprised if the majority of 07th Expansion fans weren’t interested in the mystery fiction genre, given the prevalence of mystery in a lot of Ryukishi’s works to varying degrees. In fact, Ryukishi stated that Agatha Christie’s novel And Then There Were None had been one of his major inspirations in his writing.  You can see similarities between the two.
That same novel also happens to be the bestselling mystery of all time, and within the top 10 bestselling novels of any genre; and for good reason: it’s an awesome read. If you haven’t read it yet, it’s already public domain, so go read it!
In any case, there’s bound to be plenty of locked room and mystery fiction fans around, so let’s discuss the genre!
Has there been a mystery novel you’ve read recently that you enjoyed? Are you looking for any recommendations? Did you start writing locked room mysteries yourself after Umineko?
I’ll just toss out a few authors I’ve read that are fantastic:
Agatha Christie, as mentioned previously. Along with #2 and #3, they founded the Detection Club, from which came many of the mysteries of the Golden Age of Detective Fiction. And Then There Were None and The Murder of Roger Ackroyd are considered among her most incredible works.
Monsignor Ronald Knox. A Catholic priest who wrote mysteries and codified the Ten Commandments (Decalogue) of Detection Fiction.
G.K. Chesterton. He met with the above two for brunch every few weeks in London, which is kind of amazing. He wrote the Father Brown mystery short stories, many of which concerned locked rooms and great wit. He didn’t write the normal “detective fiction” as #1 and #2 did; they’re also more character and locked room focused. And they’re in Chesterton’s prose, which is always glorious. Check out his many public domain works here! I recommend The Man Who Was Thursday and the Father Brown series. I believe the first collection book of short stories is The Innocence of Father Brown.
As for what I’m currently reading: nothing in the mystery genre; working on a WWII history book. But I plan to go back for some more Christie sometime soon.