I'm always on the lookout for BookTok recs that actually deliver the 'dark' and not just a grumpy billionaire with a mildly tragic backstory. For true suspense and twisted love, 'Haunting Adeline' by H.D. Carlton is the obvious but also a solid entry point. The cat-and-mouse stalking dynamic is genuinely unsettling, and the conspiracy plot woven in adds a layer of paranoia that I found more engaging than the usual mafia backdrop.
That said, if you want something that feels less like a trend and more like a descent, 'Deliver' by Pam Godwin is a brutal but fascinating study of captivity and obsession. It's not romantic in a traditional sense at all, which is what makes the emotional ties so disturbing and, for me, more suspenseful—you're constantly questioning how it could possibly resolve. My library haul last week had 'Does It Hurt?' by the same author, and it's a locked-room psychological thriller vibe with two awful people being awful to each other in an isolated lighthouse. The tension is less about external danger and more about which one will break first. Honestly, I finished it in a single, slightly horrified sitting and still think about the ending.
A sleeper pick that doesn't get as much hype: 'The Ritual' by Shantel Tessier. The secret society setup creates this constant low-grade dread, and the 'love' story is so deeply embedded in cruelty and manipulation it left me feeling conflicted for days, which is kind of the point.