I fully wanted to give this 5 stars, but I think I’m going with 4.5. I feel like this book was SO good and then just left a lot of unanswered questions by the end.

Things I loved:
- This story kept me very engaged. It was darker and more intense than I expected.
- Maria was a great mc, very strong and confident in her abilities and knowledge despite being doubted by everyone.
- The ice cream machine
- The creativity in murder scenes/descriptions/MO
- Setting: the isolated nature of the cruise ship was perfect

My two main issues:
- Maria questions how Butler was draining the blood from the victims. We never find out.
- Why was Steve so suspicious all the time? Why the focus on his compulsive folding before and after the security questioning him? And his quite creepy obsession with the case, and the “chance encounter” when he met Maria that seemed anything but chance.