I really liked the setting of the novel. Trapped in a submarine with monsters is a great, claustrophobic environment. The story peaked my curiosity enough to watch some videos on that class of submarine which was actually a slight detriment to enjoying the novel. The real subs are so cramped that it really wouldn’t be possible for some of the story to unfold as the novel depicts it. The story also has a few moments where it’s clear there were smarter ways to proceed for the characters, but that’s pretty typical of the genre. Nitpicking aside, it was for the most part an enjoyable, fast paced story. The narrator was solid. Overall a creepy, claustrophobic horror story.