Dead of Winter (Dead of Winter #4)

In this, the most thrilling of chapters, our heroes descend upon a police station to save a captured comrade, an apocalyptic psychotic goes to war against everyone, zombies zombies everywhere, and, yes, sweet friends, your new favorite hero, Sparky the Super Dog saves the day and we all learn not only what it takes to be a hero but exactly why that dog hates zombies so much.