I guess I'll start with what I liked about it, because unfortunately that will be the shortest part of the review...
First, I liked how he included animals being infected, as that doesn't always happen in zombie media. It makes sense that at least mammals could also be infected by the zombie thing if it's more of a biological pathogen. Having coyotes being the main spreader was interesting. I haven't read books after this one, but I could totally see infected cats and dogs as well running around, the longer the zombie apocalypse goes on.
"Don't say the 'Z' word..." Actually I like how he plays around with this trope. Some of the characters don't like to say "zombie", while others are totally all for saying "zombie". It made me wonder what the modern media would actually do in real life, if there was a zombie apocalypse. Would they see "zombie" as "problematic" like they do words such as "homeless", "illegal immigrant" and specifying any criminal's race if they are not white? Or would they totally embrace pop culture's love of zombie apocalypses and use the word "zombie" gleefully? Whatever, it was good to see a zombie book actually call them zombies. (most of the time) I hate when authors decide that their characters would never call a zombie a zombie, or use some other stupid word trying to be different or whatever.
And, um, yeah that's about it really.
So the negatives...
I did not like the characters. The women are all either Karens, aggressively snarky, or post 2015 Hollywood style "badasses" that weak pathetic male characters simp over.
The male characters don't fare much better. The deputy warden and the hospital boss are almost the same over the top, spiteful little bastards, that I almost got them confused at one point in the story. They're ridiculously bad, and there's not enough supporting reasoning for them acting the way they do towards the other characters.
Some of the dialog and writing style can be cringey. Speaking of cringe, the author actually plugs one of his own books when describing what a character's favourite recent reads were. Look, that's something that really straddles the line between amusing and lame, and is more likely to fall over on the lame side.
So I wasn't a big fan, but I did finish the book, which is actually compliment, because I'm quick to DNF books I'm not liking.
As far as zombie books go, it's ok. I've read better and I've read worse. If you like the genre, might as well try it.
If you lean left politically, there are one or two things that will make you groan, but it doesn't really have a lot of politics in it.
If you lean right politically, there's no obvious LGBT stuff or DEI stuff in it. The same thing that will make the lefties groan, might also make you groan as well.