Now, I am probably the least likely person to ever base my buying habits on future apocalypses or zombie attacks, but I got to reading a book that was posted on thehighroad.org and it was actually a fun read. Its obviously meant to be fiction and sometimes satiricle so it doesn't feel like your reading some crazy thoughts of an obscure author. The book is Monster Hunter International by Larry Correia. If you really want to know the arsenal you need to fight off a zombie/vampire invasion, this book is a basic tutorial. I liked it because it was funny and its about one man that gets to live every gun nut's fantasy.
Yelp it just kills me to watch people in the movies fightin' off hordes and hordes of zombies with a double barrel shotgun! Man they never have any real fire power! LOL!