A good effort. The story was exciting and I was engaged with the characters and interested in finding out what happened to them. A few quibbles (and some minor spoilers) though:
There were quite a few typos (words run-together, punctuation mistakes etc.) and text errors that should have been picked up: for example, 'Owlsbury' changes to 'Owlsburg' at one point. There's also a major malfunction in the first paragraph of Chapter 31 where text seems to be missing. Also, in my copy, the left margin on the contents page is all over the place (I was reading on an iPad, perhaps it's okay on a Kindle).
The point of view lurches around quite often, so in some scenes it's hard to tell who's doing what. There are also a few POV errors, for example, there's one scene described in 'Third person-inside' where a man crashes backwards through a windscreen, but somehow knows that the sharp pointy thing cutting into his back is the jagged edge of a broken steering wheel.
[Spoiler] There are more than a few occasions where it would have been better to show and not tell. For example, there's a scene in the first chapter where a man is attacked in the street that cries out for 'show'.
[Spoiler] Some moments of strange behaviour are jarring. For example, one mild-mannered character throws a man out of their refuge to be torn apart by zombies after he attempts a sexual assault. Which seems harsh. And harsher still because he also throws out the man's two innocent companions. Mr Mild is then congratulated for his forbearance in not shooting anyone - as if being eaten alive was somehow the soft option (?!).
Zombies, humm. Are these zombies? I don't mind 'fast zombies' (though I prefer mine slow), but when your fast zombies retain their memories and intelligence and can organise themselves, I think we've strayed pretty far into a 'grunge vampire' territory. Still good, but too zombie-lite for me.
I did enjoy this book, and have read worse from some more established authors, but the text would have benefited from at least one more significant re-draft.
If there's a sequel I'll pick it up.