I think a huge part is how they’re packaged. The editing on those videos is so sharp—quick cuts to the red string board, a photo of the victim, that suspicious line of dialogue read over a creepy soundtrack. It’s like a thirty-second trailer for a book, and it hooks you before you’ve even read a page. The mystery becomes a social object; you’re not just reading, you’re joining a crowd trying to solve it. Everyone’s comparing theories in the comments, pointing out the same tiny clue. That collective guessing game is ridiculously fun. It transforms reading from a solitary act into a live, communal event. You feel like you’re part of an investigation club, and the payoff when you finish and can finally scroll through the 'whodunit' reveal threads is its own kind of satisfaction.
Also, the algorithms love a good trope. 'Small town with secrets' or 'everyone’s a suspect at the fancy dinner party'—these are instantly recognizable beats. When a creator stitches three books with that same vibe, it creates a rabbit hole. You don’t just get one recommendation; you get a whole mood board. It satisfies that itch for a very specific type of story, and the constant churn of new, similarly styled mysteries means the TBR pile never shrinks. It’s a self-sustaining cycle of anticipation.