These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Archive Binge: At 370 pages, it's enough to take up a couple hours.
Complete Monster: Alan Stone. In flashbacks, it's revealed that he subjected zoo animals to hideous experiments, already giving him quite a few negative points. After beating the tar out of a sympathetic character and kicking him and the main character out into the dangerous, zombie-ridden city, he finds out his wife has been working on a cure for zombiism by testing it on a monkey she adored. His reaction? TEARING OUT THE ELECTRODES TO ITS BRAIN.Then he injects himself with the 'cure', turning into a literal monster. And then he injects his wife with it, turning her into a zombie. And his wife was pregnant. After all that, he injects the remaining zoo animals with it to build an army of the undead.
Near the end of Book 1, everyone but Nick is drowning to death.
Moral Event Horizon: Alan crosses this when he injects his pregnant wife, Lydia, with the zombie serum. If that wasn't enough, he injects the zoo animals with it to build an army, and then zombifies William.