It's just another zombie apocalypse story, probably the billionth one made, but hey, maybe it'll be a fun ride?
This is the first book in a planned trilogy and the first of potentially many OMG! books of different stories.
The genre of the book is subject to change if it doesn't feel that much like a comedy anymore at some point, though I am trying my hardest to write a silly story compared to more serious ones I write elsewhere.