A Rational Zombie

The world ended. A zombie apocalypse broke out. The main character is already dead. By the author of The Blue Mage Raised by Dragons and The Godking's Legacy. Please note that this is not a comedic story. Content Warning: Profanity, Cannibalism (Is it still cannibalism if it's a zombie eating a human?), Gore (Just a little, it comes with the cannibalism)