I see a lot of posts where people just ask "is it worth the hype?" but honestly, that phrase is kinda useless now. It's become so generic. The real stuff that tells me a book's exploding is when the terminology gets hyper-specific and then spreads like a meme. Like 'morally grey' was everywhere for a while, but now it's shifted to 'touch her and die' or 'who did this to you?' When you start seeing those exact, dramatic quotes plastered over edits, you know something's caught fire.
Another one is when people start making "reading x book like" videos with very specific, exaggerated reactions—the dramatic pause, the hand over the heart, the slow look to the camera. It's a performance, and the book becomes a prop for that shared emotional experience. That's the signal. It's less about the book's quality and more about its potential as a vehicle for a relatable, over-the-top performance of a feeling.
And honestly, the emergence of a very niche, slightly silly nickname for a character or pairing is a dead giveaway. Once a fandom starts calling someone 'Cinnamon Roll' or 'Sunshine/Grump' in every single caption, that book has officially entered the viral lexicon. The terminology isn't just descriptive; it's a membership badge.