DNF at 49%
Even I have to admit that this is well written, but it's all tell, tell, tell, tell. Letter after letter, diary entry after diary entry.
I do not care.
How can you make zombies boring? Give me a play by play of the boring crap in life afterwards. There's no sense of urgency, no worry from the characters, no action, nothing going on.
I started skimming at about 39% and gave up finally when I hit Alex's chapter and realized it was (surprise!) more of the same.