Death, cancer (I know this story sounds like a downer, but it's funny too, and the characters are fun to spend time with.), grief, the extinction of humans, the word "squish", claustrophobic scenes, the apocalypse, talking animals, corpses, mutilation (What kind of a sicko made this?), eating bugs (They're animals. Animals eat bugs. You don't have to eat the bugs.), imprisonment, dysfunctional medical industry, a goat (Some people don't like goats. They eat stuff they're not supposed to eat. A goat ate my dad's hunting license once. Kinda poetic, right? That's animal solidarity. My dad didn't like that goat.), puns, mixing genres (Sorry, librarians. You are heroes, and you deserve better!), drugs, capitalism, graffiti, rude gestures, tentacles, monsters, fish heads (Actually, a whole fish that appears to be the head of a humanoid. It's like… never mind. You'll have to read the story.), a worm that eats corpses (But only the recently deceased.), doctors, scat (That one bothers me too.), the words "squishing," "squisher," "squished," etc. (Seriously, it is said a lot.), ghosts, crows (a.k.a. The Harbinger's of Death), medical diagrams, captchas, bodybuilding… What are you still reading this? You could have finished the book by now.