The Fireman was more of a 3.5 star book but managed to hold my attention through its lengthy page count. Enough that the half star deserves to be rounded up instead of down. That being said, the book is a bit of a mixed bag. Some things are good, others are bad. On the whole, the good does outweigh the bad. The extent to which that is the case (if it is) will vary from reader to reader.
This is a sort of post-apocalypse story. A fair amount of time passes over the course of The Fireman, carrying the story from the start of the disaster to its aftermath. It is not so extreme that humanity is facing its end, but modern society certainly changes forever. That being said, the book only highlights the big picture of how things are changing from time to time. The main characters are fairly isolated for most of the story, giving things sort of a Walking Dead vibe. But the level of devastation is more on the level of the Black Plague than a true apocalypse. Compared to life before everything is terrible now, but the human race is not completely doomed.
As far as real-world comparatives go, The Fireman is probably more similar to The Stand than any other book. Both books involve a new super-disease that runs rampant and devastates society. In the aftermath, the survivors largely find themselves in one of two camps that are ultimately set against each other. The body count from the disease is not quite as high in The Fireman, but its effects are still similar. Another common factor is the fact that both books are fairly slow.
If The Fireman had one weakness, it is that is was a slow burn. This is not a story that skips around between major events. Those moments of danger are certainly more intense, but just as much page space is given to the characters living their new lives as well. There are some time skips here and there, but the story features as many slice-of-life sections as anything else. It would be a little extreme to call this a bad choice. But parts of the book just crawl. To the point where readers feel a little thankful when something bigger starts happening again. For people who love horror/thriller, The Fireman is a recommended read. For people who do not care for longer stories, not so much.