Needing gift help

Hello again!

Everyone was super helpful when I came here for myself, but now I’m searching on behalf of a friend. I want to surprise them with a book and don’t want to disappoint. I’ve added their little goodreads blurb to help show what they like, as I would love suggestions based off of what they enjoy most. Thank you in advance!

“Horror and crime fiction addict. I live for dark twists, flawed characters, and stories that keep me up way too late. Always hunting for the next unsettling read that gets under my skin and stays there. Recommendations welcome, bonus points if it’s disturbing, clever, or based on true crime”