And that’s why it’s absolutely crucial you know how to put out a grease fire. According to the National Fire Protection Association (NFPA), cooking was the leading cause of reported home fires ...

You'll eventually find the camp; now you just have to look for a big tent with a dead body inside. This dead body contains the Fire Knight's Cookbook (1).

This item equips your weapon with grease that lets you deal extra Fire Damage for 25 seconds. Each hit will inflict around 135 Fire damage. This cookbook is near Castle Ensis, in a camp.