I'm looking for mystery novels! 10Ṁ for each submission with interesting summaries and decent reviews (I do understand Goodreads is very flawed), 20Ṁ more for each book I think I will finish after reading the first chapter. Will add bounty if needed, but I will not overpopulate my backlog.
I prefer mysteries with excitement past the original crime, like many Christie novels where the criminal is forced to commit a second crime to distract or slow the detective's progress, or tries to act against the detective directly throughout the story.
Can I recommend a manga? "Don't Call It A Mystery".
https://mangadex.org/chapter/754ba9f2-ee21-4c6f-b315-6d12af29a7f0
Decapitation / Kubikiri Cycle by Nisio Isin, possibly? (Link goes to the Kindle edition; it's also available in paper copy and in various other ebook stores.) A murder mystery in the old "cast of distinctive characters trapped on an island together" style; features several crimes past the initial murder, over the course of its runtime; also lots of philosophical monologuing from pretty much everyone and especially from the narrator, because Nisio Isin is that sort of author. Not sure how to-your-tastes it's likely to be, but seems worth tossing your way just in case.
Ghost Hunters Adventure Club is fun, just as much comedy as mystery though. I liked the 39 Clues books as a kid, not sure if they hold up but maybe if you want some nostalgia.
Probably not what you're looking for, but you could look into visual novels like the Ace Attorney games. There's probably more serious/less video gamey ones out there.
The Cuckoo's Calling is pretty hard to find fault with.
"After losing his leg to a land mine in Afghanistan, Cormoran Strike is barely scraping by as a private investigator. Then John Bristow walks through his door with an amazing story: His sister, the legendary supermodel Lula Landry, famously fell to her death a few months earlier. The police ruled it a suicide, but John refuses to believe that. The case plunges Strike into the world of multimillionaire beauties, rock-star boyfriends, and desperate designers, and it introduces him to every variety of pleasure, enticement, seduction, and delusion known to man."
I don't read a lot of mystery novels so I don't know how it compares.