Suggest me addictive fantasy and thriller books

I’m trying to get into reading more fantasy and crime thriller books.

For fantasy, I like adventure, magic, dark worlds, kingdoms, strong characters, and stories that feel immersive.

For crime thrillers, I enjoy psychological suspense, investigations, serial killer stories, mind games, and unexpected plot twists.

I want books that are really addictive and hard to put down. Popular or underrated recommendations are both welcome.

What are the best books you’d suggest?