Full disclosure, I knew Nick first from his YouTube channel and later as an online friend, but I will try to be as unbiased in this review as I can.
Also, I will be spoiling the whole book.
I finished Hell's Gulf in two days, and that's in spite of me working a full eight hours on the second. I don't consider myself a very fast reader, but I found myself very drawn in by the mystery of what was so wrong with this town and why all these strange creatures were attracted to it. Nick has a knack for keeping the reader engaged, and that skill is only amplified by his ability to maintain good, even pacing throughout the book. At no point did I feel overwhelmed by the events transpiring, nor did I feel that any section was a slog to get through.
Most of the characters are unique and well-defined, and they each have their own appealing flair without being caricatures. Nick does tend to paint over a lot of the minor characters with the "uneducated rural oldster" brush when it comes to dialogue, but I was able to overlook this. All the Large Marge scenes were a treat. Her jaded, chip-on-the-shoulder outlook was very well-handled. I also really enjoyed Lusca's reveal, what with her casually spiteful dialogue and ancient-cryptid vibe. It made a great contrast to the kindness she was able to feign when mimicking Heather just moments ago. Jerome and Sebastian had a fun camaraderie (when the latter was still alive), though there were cases where their jokes felt forced or didn't really land. The attempt at accurately capturing the AAVE of Afro-Caribbean Floridians was respectful and well-intentioned, though I felt it was far from perfect in execution.
The ending of Hell's Gulf was undoubtedly one of the highlights for me, which is a rare thing to say about any book, I think. The way the Rift functions to explain all the phenomena going on in the book was just excellent, and it provides the reader with a lot of satisfying revelations to uncover through their own reflection. Throughout the book, Crowley and co. make frequent reference to Rowan being their town's harbinger of doom, but they also mention that any "foreign agents" cause trouble to arise in Hell's Gulf. This, we realize, is a result of outsiders bringing novel beliefs into Hell's Gulf and thus causing the Rift to manifest them. The latrine lizards were Millie's, Lusca was obviously Shantelle's, and the oyster-Sebastian monster was Jerome's. To me, this seems like a lot of great planning on Nick's part. Even the promotional blurb has a clever little allusion to the way the Rift works. "All you need is a little imagination." Nice.
I'll admit that it is a little too convenient for both the reader and Rowan to just happen to stumble upon the Rift when both of us needed it most. That's okay.
A few final criticisms: The arguments between Bridget and Rowan (particularly the final one) came across to me as manufactured tension. I've been trying to rationalize why Bridget is so explosively angry towards Rowan, and I can come up with a few decent justifications, I guess? But on the most basic, intuitive level, it just feels too weird to me that she's this angry with her son when they're on vacation and all that happened was he got, like, bit on the butt and slapped in the face and stayed out late once.
Similarly, I was absolutely baffled that Jerome let himself get convinced by Crowley that Rowan was the one causing Hell's Gulf's suffering. I understand that grief is pushing him to irrational blame, but I would expect that he's still retained some degree of working logic. I don't know. This could just be one of those things where different readers have different expectations, and maybe I'm the overly-cynical type.
Rowan's internal monologue was difficult to read at times for how dorky he was, but I suppose that this is by design. That is the character. He was fun to follow, he was funny, and I was pleased with his development and his growing courage throughout the book's climax. Nick wasn't corny about it either. It was a great ending to a fun book.
Also I realized I should say a few words about the horror aspect of this book, since that's the genre this is in written in after all. This kind of horror is not purely, truly scary horror, but I don't think it's really meant to be. It's fun, haunted house type horror, and Nick aptly chooses to have fun with it. To a large extent, I did, and I expect other readers will be able to as well.
If you Control + F the whole book you get no results for 'Outlast.' 4 stars